[Flask-SocketIO] Annotate event and room arguments (#16009)

Author: Wlwool

stubs/Flask-SocketIO/flask_socketio/__init__.pyi

@@ -149,7 +149,7 @@ class SocketIO:
     ) -> SocketIOTestClient: ...
 
 def emit(
-    event,
+    event: str,
     *args,
     namespace: str = "/",  # / is the default (global) namespace
     to: str | None = None,
@@ -159,8 +159,8 @@ def emit(
     broadcast: bool = False,
 ) -> None: ...
 def send(message: str, **kwargs) -> None: ...
-def join_room(room, sid: str | None = None, namespace: str | None = None) -> None: ...
-def leave_room(room, sid: str | None = None, namespace: str | None = None) -> None: ...
-def close_room(room, namespace: str | None = None) -> None: ...
+def join_room(room: str, sid: str | None = None, namespace: str | None = None) -> None: ...
+def leave_room(room: str, sid: str | None = None, namespace: str | None = None) -> None: ...
+def close_room(room: str, namespace: str | None = None) -> None: ...
 def rooms(sid: str | None = None, namespace: str | None = None) -> list[str]: ...
 def disconnect(sid: str | None = None, namespace: str | None = None, silent: bool = False) -> None: ...