Blacked and isorted the python files

Prettied and eslinted the typescript/html files

bookie/src/app/product-sale-report/product-sale-report.ts

@@ -1,11 +1,4 @@
-export class ProductSaleReportItem {
-  name: string;
-  kot: number;
-  regularBill: number;
-  noCharge: number;
-  staf: number;
-  void: number;
-}
+import { ProductSaleReportItem } from './product-sale-report-item';
 
 export class ProductSaleReport {
   startDate: string;