feat(purchases): update terminology from "محصول" to "کالا" in purchase forms and templates

refactor(purchases): remove unused purchase receipt components and consolidate receipt template logic

fix(suppliers): enhance suppliers select component to support full data option values

style(tailwind): improve theme variables for better customization and consistency

feat(shared): introduce abstract select component for reusable select field logic

chore(purchases): clean up imports and improve component structure for better maintainability

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

@@ -21,21 +21,21 @@ export const MENU_ITEMS = [
     ],
   },
   {
-    label: 'محصولات',
+    label: 'کالاها',
     icon: 'pi pi-fw pi-tags',
     items: [
       {
-        label: 'لیست محصولات',
+        label: 'لیست کالاها',
         icon: 'pi pi-fw pi-list',
         routerLink: ['/products'],
       },
       {
-        label: 'برندهای محصول',
+        label: 'برندهای کالا',
         icon: 'pi pi-fw pi-tags',
         routerLink: ['/product-brands'],
       },
       {
-        label: 'دسته‌بندی‌های محصول',
+        label: 'دسته‌بندی‌های کالا',
         icon: 'pi pi-fw pi-list',
         routerLink: ['/product-categories'],
       },