Add checkbox-list custom field plugin to Strapi

- Introduced a new custom field type 'checkbox-list' with associated input component.
- Updated package.json to reflect the new plugin name.
- Added necessary server-side files for plugin registration, including bootstrap, destroy, and service methods.
- Updated package-lock.json to include new dependencies and versions.
- Enhanced admin interface with custom field registration and input handling.

server/src/register.ts

@@ -2,6 +2,11 @@ import type { Core } from '@strapi/strapi';
 
 const register = ({ strapi }: { strapi: Core.Strapi }) => {
   // register phase
+  strapi.customFields.register({
+    name: 'checkbox-list',
+    plugin: 'checkbox-list',
+    type: 'json',
+  });
 };
 
 export default register;