fix: Windows上无法读取和应用命令权限配置的问题

pkg/qqbot/cmds/mgr.py

@@ -315,8 +315,12 @@ def register_all():
 
 def apply_privileges():
     """读取cmdpriv.json并应用指令权限"""
-    with open('cmdpriv.json', 'r') as f:
+    # 读取内容
-        data = json.load(f)
+    json_str = ""
+    with open('cmdpriv.json', 'r', encoding="utf-8") as f:
+        json_str = f.read()
+
+    data = json.loads(json_str)
     for path, priv in data.items():
         if path == 'comment':
             continue