初步的 kvmd 国际化（汉化）支持

1. 添加汉化文件
2. 添加 Lanuages().gettext 函数处理字符替换
3. 修改相关字符串调用

kvmd/usb.py

@@ -22,6 +22,8 @@
 
 import os
 
+from .lanuages import Lanuages
+
 from . import env
 
 
@@ -31,10 +33,10 @@ def find_udc(udc: str) -> str:
     candidates = sorted(os.listdir(path))
     if not udc:
         if len(candidates) == 0:
-            raise RuntimeError("Can't find any UDC")
+            raise RuntimeError(Lanuages().gettext("Can't find any UDC"))
         udc = candidates[0]
     elif udc not in candidates:
-        raise RuntimeError(f"Can't find selected UDC: {udc}")
+        raise RuntimeError(Lanuages().gettext(f"Can't find selected UDC: {udc}"))
     return udc  # fe980000.usb