feat: Implement product categories, stores, suppliers, and users management features

- Added ProductCategoriesService for handling product category API interactions.
- Created components for listing and viewing product categories.
- Implemented UI for managing product categories with a data list component.
- Developed StoresService for managing store-related API calls.
- Created components for listing and viewing stores with appropriate UI.
- Added SuppliersService for handling supplier API interactions.
- Implemented components for managing suppliers with a data list component.
- Developed UsersService for managing user-related API calls.
- Created components for listing and viewing users with appropriate UI.
- Enhanced not found page with improved layout and navigation options.

src/app/core/constants/menuItems.const.ts

@@ -0,0 +1,71 @@
+import { MenuItem } from 'primeng/api';
+export const MENU_ITEMS = [
+  {
+    items: [
+      {
+        label: 'داشبورد',
+        icon: 'pi pi-fw pi-home',
+        routerLink: ['/dashboard'],
+      },
+    ],
+  },
+  {
+    label: 'موجودی‌ها',
+    icon: 'pi pi-fw pi-box',
+    items: [
+      {
+        label: 'لیست موجودی‌ها',
+        icon: 'pi pi-fw pi-list',
+        routerLink: ['/inventories'],
+      },
+    ],
+  },
+  {
+    label: 'محصولات',
+    icon: 'pi pi-fw pi-tags',
+    items: [
+      {
+        label: 'لیست محصولات',
+        icon: 'pi pi-fw pi-list',
+        routerLink: ['/products'],
+      },
+      {
+        label: 'برندهای محصول',
+        icon: 'pi pi-fw pi-tags',
+        routerLink: ['/product-brands'],
+      },
+      {
+        label: 'دسته‌بندی‌های محصول',
+        icon: 'pi pi-fw pi-list',
+        routerLink: ['/product-categories'],
+      },
+    ],
+  },
+  {
+    label: 'تامین‌کنندگان',
+    icon: 'pi pi-fw pi-users',
+    items: [
+      {
+        label: 'لیست تامین‌کنندگان',
+        icon: 'pi pi-fw pi-list',
+        routerLink: ['/suppliers'],
+      },
+    ],
+  },
+  {
+    label: 'مدیریت سیستم',
+    icon: 'pi pi-fw pi-cog',
+    items: [
+      {
+        label: 'فروشگاه‌ها',
+        icon: 'pi pi-fw pi-store',
+        routerLink: ['/stores'],
+      },
+      {
+        label: 'کاربران',
+        icon: 'pi pi-fw pi-user',
+        routerLink: ['/users'],
+      },
+    ],
+  },
+] as MenuItem[];