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/shared/components/index.ts

@@ -1,3 +1,4 @@
+export * from './abstract-select.component';
 export * from './breadcrumb.component';
 export * from './card-data.component';
 export * from './inlineConfirmation/inline-confirmation.component';