refactor: update import paths for sale invoice models; add VAT handling in payload forms

src/app/domains/pos/models/good.io.ts

@@ -7,6 +7,7 @@ export interface IGoodRawResponse {
     id: string;
     code: string;
     name: string;
+    vat: string;
   };
   category: ISummary;
   measure_unit: ISummary;