feat(admin): 新增弹框是否允许在新标签页中打开 add option to open iframe in new tab

- Add 'iframe_open_top' configuration to admin site settings
- Implement functionality to open iframe in new tab if configured
- Update admin layout to include new configuration option
- Modify easy-admin.js to support new tab opening for iframes

Signed-off-by: wolfcode <37436228+wolf-leo@users.noreply.github.com>

app/common/controller/AdminController.php

@@ -240,6 +240,7 @@ class AdminController extends BaseController
             'version'              => env('APP_DEBUG') ? time() : ConfigService::getVersion(),
             'adminUploadUrl'       => url('ajax/upload', [], false),
             'adminEditor'          => sysConfig('site', 'editor_type') ?: 'wangEditor',
+            'iframeOpenTop'           => sysConfig('site', 'iframe_open_top') ?: 0,
         ];
         View::assign($data);
     }