feat(attendance): make captcha requirement configurable

- add Filament toggle to control whether attendance check-in requires captcha
- persist the toggle under captcha.attendance.enabled with sensible defaults

Signed-off-by: Qi HU <github@spcsky.com>

resources/lang/zh_TW/label.php

@@ -144,6 +144,10 @@ return [
                 'size_normal' => '一般',
                 'size_compact' => '緊湊',
             ],
+            'attendance' => [
+                'enabled' => '啟用簽到驗證碼',
+                'enabled_help' => '啟用後，使用者簽到前必須完成驗證碼驗證。',
+            ],
         ],
         'meilisearch' => [
             'tab_header' => 'Meilisearch',