Remove client and common packages, rework some converter approach, update python version in CI

Author: cretz

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        python: ["3.9"]
+        python: ["3.7", "3.10"]
         os: [ubuntu-latest] # TODO: macos-latest, windows-latest
     runs-on: ${{ matrix.os }}
     steps:

scripts/gen-protos.py

@@ -1,14 +1,13 @@
 #!/usr/bin/env python3
 import collections
-import os
 import re
 import shutil
 import subprocess
 import sys
 import tempfile
 from functools import partial
 from pathlib import Path
-from typing import Mapping
+from typing import List, Mapping
 
 base_dir = Path(__file__).parent.parent
 proto_dir = base_dir / "temporalio" / "bridge" / "sdk-core" / "protos"
@@ -43,7 +42,7 @@ def fix_generated_output(base_path: Path):
         (https://github.com/protocolbuffers/protobuf/issues/1491)
     """
 
-    imports: Mapping[str, list[str]] = collections.defaultdict(list)
+    imports: Mapping[str, List[str]] = collections.defaultdict(list)
     for p in base_path.iterdir():
         if p.is_dir():
             fix_generated_output(p)

temporalio/__init__.py

@@ -1,5 +0,0 @@
-import typing
-
-from .common import RetryPolicy
-
-Convertible = typing.Any