[feat] add fastapi adapter

adapter/http/fastapi/app.py

@@ -0,0 +1,18 @@
+from adapter.config.loader import load_config
+from adapter.config.model import AppConfig
+from adapter.http.fastapi.dependencies import APP_CONFIG_STATE
+from adapter.http.fastapi.lifespan import app_lifespan
+from adapter.http.fastapi.middleware import register_middleware
+from adapter.http.fastapi.routers.v1.router import router as v1_router
+from fastapi import FastAPI
+
+API_V1_PREFIX = '/api/v1'
+
+
+def create_app(config: AppConfig | None = None) -> FastAPI:
+    app_config = load_config() if config is None else config
+    app = FastAPI(title=app_config.app.name, lifespan=app_lifespan)
+    setattr(app.state, APP_CONFIG_STATE, app_config)
+    register_middleware(app)
+    app.include_router(v1_router, prefix=API_V1_PREFIX)
+    return app