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/lib/api/menu.ts

@@ -40,6 +40,8 @@ export interface MenuItem {
   TRANSLATED_NAME?: string;
   translated_desc?: string;
   TRANSLATED_DESC?: string;
+  menu_icon?: string;
+  MENU_ICON?: string;
 }
 
 export interface MenuFormData {
@@ -52,8 +54,9 @@ export interface MenuFormData {
   menuType: string;
   status: string;
   companyCode: string;
-  langKey?: string; // 다국어 키 추가
-  screenCode?: string; // 화면 코드 추가
+  langKey?: string;
+  screenCode?: string;
+  menuIcon?: string;
 }
 
 export interface LangKey {