Allow for a customizable fallback mapper

src/dj_angles/tags.py

@@ -2,6 +2,8 @@
 
 from minestrone import Element
 
+from django.utils.module_loading import import_string
+
 from dj_angles.attributes import Attributes
 from dj_angles.mappers.angles import map_angles_include
 from dj_angles.mappers.include import map_include
@@ -92,8 +94,10 @@ def get_django_template_tag(self, slots: Optional[list[tuple[str, Element]]] = N
             return f"{django_template_tag}</{wrapping_tag_name}>"
 
         if self.django_template_tag is None:
-            # Assume any missing template tag is an include
-            self.django_template_tag = map_include
+            # Assume any missing template tag should use the fallback mapper
+            self.django_template_tag = import_string(
+                get_setting("fallback_mapper", "dj_angles.mappers.include.map_include")
+            )
 
             # Add component name to the template tags
             self.attributes.prepend(self.component_name)