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/uikit/datepicker/datepicker.component.ts

@@ -28,6 +28,8 @@ export class UikitFlatpickrJalaliComponent implements OnInit {
   @Input() disabled = false;
   @Input() name: string = 'datepicker';
   @Input() options: Partial<BaseOptions> = {};
+  @Input() showLabel: boolean = true;
+  @Input() showErrors: boolean = true;
 
   @Output() valueChange = new EventEmitter<string>();