feat(showcase): add PouchDB sample component and storage page

- Implemented PouchSample component for managing POS configurations and item inventories using PouchDB.
- Created StoragePage to encapsulate the PouchSample component.
- Added UI components page with various UI elements including buttons, forms, and data grids.
- Defined Electron type declarations for printing and auto-update functionalities.
- Extended event registry with custom application events for printing and stock updates.
- Configured Vite for the showcase application with React and Tailwind CSS support.
- Updated package.json and pnpm-lock.yaml to include necessary dependencies for the showcase app.

apps/showcase/src/pages/events/components/example/example.page.tsx

@@ -0,0 +1,22 @@
+import BookingSample from './features/booking/presentation/BookingSample';
+import StorageSample from './features/storage/presentation/StorageSample';
+import I18nSample from './features/i18n/presentation/I18nSample';
+
+export default function ExamplePage() {
+  return (
+    <div className="bg-amber-200">
+      example
+      <div className="p-8">
+        <h1 className="text-2xl font-bold mb-4">Enterprise Web App</h1>
+        <BookingSample />
+      </div>
+      <div className="p-8">
+        <h1 className="text-2xl font-bold mb-4">Enterprise Web App</h1>
+        <StorageSample />
+      </div>
+      <div className="p-8 bg-slate-900">
+        <I18nSample />
+      </div>
+    </div>
+  );
+}