[feat] add fastapi adapter

adapter/http/fastapi/dependencies.py

@@ -0,0 +1,19 @@
+from typing import cast
+
+from adapter.di.container import AppContainer
+from fastapi import Depends, Request
+from usecase.user import GetUser
+
+APP_CONTAINER_STATE = 'container'
+APP_CONFIG_STATE = 'config'
+
+
+def get_container(request: Request) -> AppContainer:
+    container = getattr(request.app.state, APP_CONTAINER_STATE, None)
+    if container is None:
+        raise RuntimeError('container unavailable')
+    return cast(AppContainer, container)
+
+
+def get_get_user(container: AppContainer = Depends(get_container)) -> GetUser:
+    return container.usecases.get_user