feat: Add menu icon support in menu management

- Enhanced the menu management functionality by adding a new `menu_icon` field in the database schema, allowing for the storage of menu icons.
- Updated the `saveMenu` and `updateMenu` functions in the admin controller to handle the new `menu_icon` field during menu creation and updates.
- Modified the `AdminService` to include `MENU_ICON` in various queries, ensuring that the icon data is retrieved and processed correctly.
- Integrated the `MenuIconPicker` component in the frontend to allow users to select and display menu icons in the `MenuFormModal`.
- Updated the sidebar and layout components to utilize the new icon data, enhancing the visual representation of menus across the application.

frontend/types/menu.ts

@@ -23,6 +23,9 @@ export interface MenuItem {
   // 계층적 메뉴 구조를 위한 필드들
   children?: MenuItem[];
 
+  // 아이콘 필드
+  menu_icon?: string;
+
   // 번역 관련 필드들
   translated_name?: string;
   translated_desc?: string;
@@ -47,6 +50,9 @@ export interface MenuItem {
   COMPANY_CODE?: string;
   COMPANY_NAME?: string;
 
+  // 아이콘 대문자 키
+  MENU_ICON?: string;
+
   // 번역 관련 대문자 키들
   TRANSLATED_NAME?: string;
   TRANSLATED_DESC?: string;