Sync fastapi docs from 50fa3f7c on 2026-01-11

docs_src/configure_swagger_ui/tutorial002_py39.py

@@ -0,0 +1,8 @@
+from fastapi import FastAPI
+
+app = FastAPI(swagger_ui_parameters={"syntaxHighlight": {"theme": "obsidian"}})
+
+
+@app.get("/users/{username}")
+async def read_user(username: str):
+    return {"message": f"Hello {username}"}