进一步的 kvmd 国际化（汉化）支持，添加配置入口

yaml 配置示例：
```
languages:
    console: zh
    web: zh
```

kvmd/plugins/auth/radius.py

@@ -36,7 +36,7 @@ from ...logging import get_logger
 
 from ... import aiotools
 
-from ...lanuages import Lanuages
+from ...languages import Languages
 
 from . import BaseAuthService
 
@@ -442,5 +442,5 @@ class Plugin(BaseAuthService):
             response = client.SendPacket(request)
             return (response.code == pyrad.packet.AccessAccept)
         except Exception:
-            get_logger().exception(Lanuages().gettext("Failed RADIUS auth request for user %r"), user)
+            get_logger().exception(Languages().gettext("Failed RADIUS auth request for user %r"), user)
             return False