[Enhance] Link Play Rooms info & API for that

- Add an HTTP API endpoint for getting the information of rooms and players in Link Play

latest version/api/multiplay.py

@@ -0,0 +1,21 @@
+from flask import Blueprint, request
+
+from core.linkplay import RemoteMultiPlayer
+
+from .api_auth import api_try, request_json_handle, role_required
+from .api_code import success_return
+
+
+bp = Blueprint('multiplay', __name__, url_prefix='/multiplay')
+
+
+@bp.route('/rooms', methods=['GET'])
+@role_required(request, ['select'])
+@request_json_handle(request, optional_keys=['offset', 'limit'])
+@api_try
+def rooms_get(data, user):
+    '''获取房间列表'''
+
+    r = RemoteMultiPlayer().get_rooms(offset=data.get(
+        'offset', 0), limit=data.get('limit', 100))
+    return success_return(r)