Make _StrPromise and _StrOrPromise public.

This removes the leading underscore for both of these types since they
will be needed by the users when typing "StrPromise" related things.

Since the type is stub only, it needs to be imported conditionally:

```
from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from django.utils.functional import StrPromise
```

Signed-off-by: Zixuan James Li <p359101898@gmail.com>

django-stubs/apps/config.pyi

@@ -3,7 +3,7 @@ from typing import Dict, Iterator, Optional, Type
 
 from django.apps.registry import Apps
 from django.db.models.base import Model
-from django.utils.functional import _StrOrPromise
+from django.utils.functional import StrOrPromise
 
 MODELS_MODULE_NAME: str
 
@@ -12,7 +12,7 @@ class AppConfig:
     module: Optional[types.ModuleType] = ...
     apps: Optional[Apps] = ...
     label: str = ...
-    verbose_name: _StrOrPromise = ...
+    verbose_name: StrOrPromise = ...
     path: str = ...
     models_module: Optional[str] = ...
     models: Dict[str, Type[Model]] = ...

django-stubs/contrib/admin/options.pyi

@@ -41,7 +41,7 @@ from django.http.response import HttpResponse, HttpResponseRedirect, JsonRespons
 from django.template.response import _TemplateForResponseT
 from django.urls.resolvers import URLPattern
 from django.utils.datastructures import _ListOrTuple
-from django.utils.functional import _StrOrPromise
+from django.utils.functional import StrOrPromise
 from django.utils.safestring import SafeString
 from typing_extensions import Literal, TypedDict
 
@@ -297,8 +297,8 @@ class InlineModelAdmin(Generic[_ChildModelT, _ParentModelT], BaseModelAdmin[_Chi
     min_num: Optional[int] = ...
     max_num: Optional[int] = ...
     template: str = ...
-    verbose_name: Optional[_StrOrPromise] = ...
-    verbose_name_plural: Optional[_StrOrPromise] = ...
+    verbose_name: Optional[StrOrPromise] = ...
+    verbose_name_plural: Optional[StrOrPromise] = ...
     can_delete: bool = ...
     show_change_link: bool = ...
     classes: Optional[Sequence[str]] = ...

django-stubs/contrib/admin/sites.pyi

@@ -11,7 +11,7 @@ from django.http.request import HttpRequest
 from django.http.response import HttpResponse
 from django.template.response import TemplateResponse
 from django.urls import URLPattern, URLResolver
-from django.utils.functional import LazyObject, _StrOrPromise
+from django.utils.functional import LazyObject, StrOrPromise
 
 if sys.version_info >= (3, 9):
     from weakref import WeakSet
@@ -77,7 +77,7 @@ class AdminSite:
     def i18n_javascript(self, request: HttpRequest, extra_context: Optional[Dict[str, Any]] = ...) -> HttpResponse: ...
     def logout(self, request: HttpRequest, extra_context: Optional[Dict[str, Any]] = ...) -> TemplateResponse: ...
     def login(self, request: HttpRequest, extra_context: Optional[Dict[str, Any]] = ...) -> HttpResponse: ...
-    def _build_app_dict(self, request: HttpRequest, label: Optional[_StrOrPromise] = ...) -> Dict[str, Any]: ...
+    def _build_app_dict(self, request: HttpRequest, label: Optional[StrOrPromise] = ...) -> Dict[str, Any]: ...
     def get_app_list(self, request: HttpRequest) -> List[Any]: ...
     def index(self, request: HttpRequest, extra_context: Optional[Dict[str, Any]] = ...) -> TemplateResponse: ...
     def app_index(

django-stubs/contrib/admin/widgets.pyi

@@ -7,14 +7,14 @@ from django.db.models.fields import _FieldChoices
 from django.db.models.fields.reverse_related import ForeignObjectRel, ManyToManyRel, ManyToOneRel
 from django.forms.models import ModelChoiceIterator
 from django.forms.widgets import Media, _OptAttrs
-from django.utils.functional import _StrOrPromise
+from django.utils.functional import StrOrPromise
 
 class FilteredSelectMultiple(forms.SelectMultiple):
-    verbose_name: _StrOrPromise = ...
+    verbose_name: StrOrPromise = ...
     is_stacked: bool = ...
     def __init__(
         self,
-        verbose_name: _StrOrPromise,
+        verbose_name: StrOrPromise,
         is_stacked: bool,
         attrs: Optional[_OptAttrs] = ...,
         choices: _FieldChoices = ...,

django-stubs/contrib/gis/db/models/fields.pyi

@@ -2,7 +2,7 @@ from typing import Any, Iterable, NamedTuple, Optional, Tuple, TypeVar, Union
 
 from django.core.validators import _ValidatorCallable
 from django.db.models.fields import Field, _ErrorMessagesT, _FieldChoices
-from django.utils.functional import _StrOrPromise
+from django.utils.functional import StrOrPromise
 
 # __set__ value type
 _ST = TypeVar("_ST")
@@ -20,7 +20,7 @@ def get_srid_info(srid: int, connection: Any) -> SRIDCacheEntry: ...
 class BaseSpatialField(Field[_ST, _GT]):
     def __init__(
         self,
-        verbose_name: Optional[Union[_StrOrPromise, bytes]] = ...,
+        verbose_name: Optional[Union[StrOrPromise, bytes]] = ...,
         srid: int = ...,
         spatial_index: bool = ...,
         *,
@@ -39,7 +39,7 @@ class BaseSpatialField(Field[_ST, _GT]):
         unique_for_month: Optional[str] = ...,
         unique_for_year: Optional[str] = ...,
         choices: Optional[_FieldChoices] = ...,
-        help_text: _StrOrPromise = ...,
+        help_text: StrOrPromise = ...,
         db_column: Optional[str] = ...,
         db_tablespace: Optional[str] = ...,
         validators: Iterable[_ValidatorCallable] = ...,
@@ -66,7 +66,7 @@ class GeometryField(BaseSpatialField):
     geography: Any = ...
     def __init__(
         self,
-        verbose_name: Optional[Union[_StrOrPromise, bytes]] = ...,
+        verbose_name: Optional[Union[StrOrPromise, bytes]] = ...,
         dim: int = ...,
         geography: bool = ...,
         *,
@@ -89,7 +89,7 @@ class GeometryField(BaseSpatialField):
         unique_for_month: Optional[str] = ...,
         unique_for_year: Optional[str] = ...,
         choices: Optional[_FieldChoices] = ...,
-        help_text: _StrOrPromise = ...,
+        help_text: StrOrPromise = ...,
         db_column: Optional[str] = ...,
         db_tablespace: Optional[str] = ...,
         validators: Iterable[_ValidatorCallable] = ...,

django-stubs/contrib/postgres/fields/array.pyi

@@ -5,7 +5,7 @@ from django.db.models import Field, Transform
 from django.db.models.expressions import Combinable
 from django.db.models.fields import _ErrorMessagesT, _FieldChoices
 from django.db.models.fields.mixins import CheckFieldDefaultMixin
-from django.utils.functional import _StrOrPromise
+from django.utils.functional import StrOrPromise
 
 # __set__ value type
 _ST = TypeVar("_ST")
@@ -43,7 +43,7 @@ class ArrayField(CheckFieldDefaultMixin, Field[_ST, _GT]):
         unique_for_month: Optional[str] = ...,
         unique_for_year: Optional[str] = ...,
         choices: Optional[_FieldChoices] = ...,
-        help_text: _StrOrPromise = ...,
+        help_text: StrOrPromise = ...,
         db_column: Optional[str] = ...,
         db_tablespace: Optional[str] = ...,
         validators: Iterable[_ValidatorCallable] = ...,

django-stubs/core/cache/backends/db.pyi

@@ -1,14 +1,14 @@
 from typing import Any, Dict
 
 from django.core.cache.backends.base import BaseCache
-from django.utils.functional import _StrOrPromise
+from django.utils.functional import StrOrPromise
 
 class Options:
     db_table: str = ...
     app_label: str = ...
     model_name: str = ...
-    verbose_name: _StrOrPromise = ...
-    verbose_name_plural: _StrOrPromise = ...
+    verbose_name: StrOrPromise = ...
+    verbose_name_plural: StrOrPromise = ...
     object_name: str = ...
     abstract: bool = ...
     managed: bool = ...

django-stubs/core/exceptions.pyi

@@ -1,6 +1,6 @@
 from typing import Any, Dict, Iterator, List, Optional, Tuple, Union
 
-from django.utils.functional import _StrPromise
+from django.utils.functional import StrPromise
 from typing_extensions import Literal
 
 class FieldDoesNotExist(Exception): ...
@@ -36,7 +36,7 @@ class ValidationError(Exception):
     def __init__(
         self,
         # Accepts arbitrarily nested data structure, mypy doesn't allow describing it accurately.
-        message: Union[str, _StrPromise, ValidationError, Dict[str, Any], List[Any]],
+        message: Union[str, StrPromise, ValidationError, Dict[str, Any], List[Any]],
         code: Optional[str] = ...,
         params: Optional[Dict[str, Any]] = ...,
     ) -> None: ...

django-stubs/core/validators.pyi

@@ -3,7 +3,7 @@ from re import RegexFlag
 from typing import Any, Callable, Collection, Dict, List, Optional, Pattern, Sequence, Sized, Tuple, Union
 
 from django.core.files.base import File
-from django.utils.functional import _StrPromise
+from django.utils.functional import StrPromise
 
 EMPTY_VALUES: Any
 
@@ -12,14 +12,14 @@ _ValidatorCallable = Callable[[Any], None]
 
 class RegexValidator:
     regex: _Regex = ...  # Pattern[str] on instance, but may be str on class definition
-    message: Union[str, _StrPromise] = ...
+    message: Union[str, StrPromise] = ...
     code: str = ...
     inverse_match: bool = ...
     flags: int = ...
     def __init__(
         self,
         regex: Optional[_Regex] = ...,
-        message: Union[str, _StrPromise, None] = ...,
+        message: Union[str, StrPromise, None] = ...,
         code: Optional[str] = ...,
         inverse_match: Optional[bool] = ...,
         flags: Optional[RegexFlag] = ...,