✨ Feature: 添加 websockets 驱动器 proxy 连接警告 (#2916)

Co-authored-by: Ju4tCode <42488585+yanyongyu@users.noreply.github.com>

nonebot/drivers/websockets.py

@@ -69,6 +69,8 @@ def type(self) -> str:
     @override
     @asynccontextmanager
     async def websocket(self, setup: Request) -> AsyncGenerator["WebSocket", None]:
+        if setup.proxy is not None:
+            logger.warning("proxy is not supported by websockets driver")
         connection = Connect(
             str(setup.url),
             extra_headers={**setup.headers, **setup.cookies.as_header(setup)},