[mirotalksfu] - add chat to query params, update widget

app/api/join/join.py

@@ -19,6 +19,7 @@ data = {
     "audio": "false",
     "video": "false",
     "screen": "false",
+    "chat": "false",
     "hide": "false",
     "notify": "true",
     "duration": "unlimited",