enhance(frontend): Add an option to customize Lockdown duration (#16405)

* chore(locales): Add "setManually" and "_time.month"

Add Japanese locales to auto-generate other languages.

* feat(frontend): Add text fields to set lockdown duration manually

Choose from presets or set it manually.

* refactor(frontend): Make objects contains option's values and labels

When adding a new option, it needed to write two times.

* docs(changelog): Add a description about this change

Users can notice what's changed by this PR.

* refactor(frontend): Manage state by MkSelect

The functions only initialize the values.

* refactor(frontend): Make the custom input as writable computed

Clean up the MkInput components.

* chore(locales): Switch to "custom"

A single word is better than sentence on this situation.

* refactor(frontend): Insert the custom button to presets

Users don't need to click multiple times to use prests.

locales/ja-JP.yml

@@ -1054,6 +1054,7 @@ permissionDeniedError: "操作が拒否されました"
 permissionDeniedErrorDescription: "このアカウントにはこの操作を行うための権限がありません。"
 preset: "プリセット"
 selectFromPresets: "プリセットから選択"
+custom: "カスタム"
 achievements: "実績"
 gotInvalidResponseError: "サーバーの応答が無効です"
 gotInvalidResponseErrorDescription: "サーバーがダウンまたはメンテナンスしている可能性があります。しばらくしてから再度お試しください。"
@@ -2321,6 +2322,7 @@ _time:
   minute: "分"
   hour: "時間"
   day: "日"
+  month: "ヶ月"
 
 _2fa:
   alreadyRegistered: "既に設定は完了しています。"