refactor: restructure storage and environment modules; remove unused code

- Deleted unused PouchDB configuration and types from core storage.
- Removed Electron-related hooks and utilities that are no longer needed.
- Introduced new local storage management for application keys.
- Created a new environment wrapper for landing application.
- Added public HTTP client for landing application with minimal configuration.
- Implemented new PouchDB entities for items and POS configurations.
- Updated main application entry point to reflect new storage structure.

apps/landing/src/features/public-content/data/public.data-services.ts

@@ -1,6 +1,6 @@
 import { CommonRemoteDataServices } from '@repo/core-api/data-services';
 import type { BaseEntity } from '@repo/core-api/data-services';
-import { publicClient } from '../../../lib/api-client';
+import { publicClient } from '../../../core/lib/api-client';
 
 // ─── Domain Entity ──────────────────────────────────────────────
 
@@ -31,10 +31,7 @@ export interface PublicContentEntity extends BaseEntity {
  * const { data: post } = await publicContentServices.getOne('hello-world');
  * ```
  */
-export const publicContentServices = new CommonRemoteDataServices<PublicContentEntity>(
-  publicClient,
-  {
-    apiUrl: '/content',
-    moduleKey: 'PUBLIC_CONTENT',
-  },
-);
+export const publicContentServices = new CommonRemoteDataServices<PublicContentEntity>(publicClient, {
+  apiUrl: '/content',
+  moduleKey: 'PUBLIC_CONTENT',
+});