✨ Add support for declaring UploadFile parameters without explicit File() (#4469)

docs_src/request_files/tutorial001_03.py

@@ -0,0 +1,15 @@
+from fastapi import FastAPI, File, UploadFile
+
+app = FastAPI()
+
+
+@app.post("/files/")
+async def create_file(file: bytes = File(..., description="A file read as bytes")):
+    return {"file_size": len(file)}
+
+
+@app.post("/uploadfile/")
+async def create_upload_file(
+    file: UploadFile = File(..., description="A file read as UploadFile")
+):
+    return {"filename": file.filename}