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/web/src/main.tsx

@@ -16,7 +16,7 @@ import './main.css';
 import { lazy, StrictMode } from 'react';
 import { createRoot } from 'react-dom/client';
 import { setupI18n } from '@repo/core-i18n';
-import { secureStorage, AppStorageKey } from './core/storage';
+import { secureStorage, AppStorageKey } from './core/storage/local';
 
 const App = lazy(() => import('./apps'));