feat(MemberGroupPhoto): implement group photo management functionality

- Added MemberGroupPhoto model and established relationships with Club and User models.
- Introduced new routes for managing group photos in the backend.
- Enhanced frontend components to support group photo cropping and member image updates.
- Updated localization files to include new terms related to group photo processing across multiple languages.
- Refactored server.js to include MemberGroupPhoto in the synchronization process.

backend/migrations/20260415_create_member_group_photo.sql

@@ -0,0 +1,28 @@
+-- Migration: Store group photos for later member photo cropping.
+
+CREATE TABLE IF NOT EXISTS `member_group_photo` (
+  `id` INT NOT NULL AUTO_INCREMENT,
+  `club_id` INT NOT NULL,
+  `title` VARCHAR(255) NOT NULL,
+  `description` TEXT NULL,
+  `file_name` VARCHAR(255) NOT NULL,
+  `original_file_name` VARCHAR(255) NULL,
+  `mime_type` VARCHAR(100) NULL,
+  `file_size` INT NULL,
+  `width` INT NULL,
+  `height` INT NULL,
+  `taken_at` DATETIME NULL,
+  `created_by_user_id` INT NULL,
+  `created_at` DATETIME NOT NULL,
+  `updated_at` DATETIME NOT NULL,
+  PRIMARY KEY (`id`),
+  INDEX `idx_member_group_photo_club_id` (`club_id`),
+  CONSTRAINT `fk_member_group_photo_club`
+    FOREIGN KEY (`club_id`) REFERENCES `clubs` (`id`)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE,
+  CONSTRAINT `fk_member_group_photo_created_by`
+    FOREIGN KEY (`created_by_user_id`) REFERENCES `user` (`id`)
+    ON DELETE SET NULL
+    ON UPDATE CASCADE
+);