feat: implement sync/async support with httppx and unasync

The "_sync" folder is generated automatically with the
"make build_sync" command.

All scripts in the "_async" folder will be translated into their
synchronous form using "unasync" behind the scenes.

Makefile

@@ -0,0 +1,6 @@
+build_sync:
+	if [ -d "build" ]; then rm -r "build"; fi
+	python build_sync.py build
+	if [ -d "gotrue/_sync" ]; then rm -r "gotrue/_sync"; fi
+	cp -r "build/lib/gotrue/_sync" "gotrue/_sync"
+	rm -r "build"

build_sync.py

@@ -0,0 +1,8 @@
+from setuptools import find_packages, setup
+from unasync import cmdclass_build_py
+
+setup(
+    packages=find_packages(exclude=["tests"]),
+    # package_dir={"": "gotrue"},
+    cmdclass={"build_py": cmdclass_build_py()},  # type: ignore
+)

gotrue/__init__.py

@@ -1,6 +1,12 @@
 __version__ = "0.2.0"
 
-from . import api  # noqa: F401
-from . import client  # noqa: F401
-from .client import Client, GoTrueClient  # noqa: F401
-from .lib.types import *  # noqa: F401, F403
+from ._async.api import AsyncGoTrueApi  # noqa: F401
+from ._async.client import AsyncGoTrueClient  # noqa: F401
+from ._async.storage import AsyncMemoryStorage, AsyncSupportedStorage  # noqa: F401
+from ._sync.api import SyncGoTrueApi  # noqa: F401
+from ._sync.client import SyncGoTrueClient  # noqa: F401
+from ._sync.storage import SyncMemoryStorage, SyncSupportedStorage  # noqa: F401
+from .common.types import *  # noqa: F401, F403
+
+Client = SyncGoTrueClient
+GoTrueApi = SyncGoTrueApi