feat: implement stock keeping unit management form and list components

- Added StockKeepingUnitFormComponent for creating and editing stock keeping units.
- Introduced StockKeepingUnitsComponent for listing stock keeping units with pagination.
- Integrated form fields for code, name, VAT, and SKU type in the stock keeping unit form.
- Created API routes for stock keeping units with CRUD operations.
- Updated input components to handle numeric and price types with Persian/Arabic digit normalization.
- Enhanced key-value component to support tag display instead of badge.
- Adjusted layout styles for sidebar menu.
- Added AGENT.md for repository-specific coding guidelines and practices.
- Implemented good management form with file upload and category selection.

src/app/domains/pos/layouts/layout.component.html

@@ -1,5 +1,7 @@
 <ng-template #topbarStart>
   <p-button (click)="toggleMenu()" icon="pi pi-bars" outlined size="large" />
+  <p-button (click)="refresh()" icon="pi pi-bars" outlined size="large" />
+  <p-button (click)="doPay()" icon="pi pi-bars" outlined size="large" />
 </ng-template>
 
 <ng-template #topbarCenter>
@@ -20,7 +22,7 @@
 <ng-template #topbarEnd>
   <div class="">
     <p-menu #menu [model]="profileMenuItems" [popup]="true" />
-    <p-button (click)="menu.toggle($event)" icon="pi pi-user" text severity="contrast" size="large" />
+    <p-button (click)="menu.toggle($event)" icon="pi pi-user" text outlined size="large" />
   </div>
 </ng-template>