[Feature] Please add German keyboard to VM console

### The required feature described as a wish

As a User, Admin and Operator, I would like to use a German keyboard layout in the VM Remote Console. This helps prevent typing errors, especially when entering passwords.

該 issue 只提到了 VM Remote Console，沒有提供檔案或測試。首先定位 console 的進入點和現有的鍵盤配置處理，然後檢查 console 輸入是如何測試的；當可以使用德語配置並產生正確的字元（包括輸入密碼期間）時，即表示完成。

由索引模型根據 Issue 內容生成。