feat: implement purchase receipt items management with create, update, find, and delete functionalities

feat: add purchase receipts management with create, update, find, and delete functionalities

feat: implement sales invoice items management with create, update, find, and delete functionalities

feat: add sales invoices management with create, update, find, and delete functionalities

feat: implement stock adjustments management with create, update, find, and delete functionalities

feat: add stock balance retrieval functionality

feat: implement stock movements management with create, update, find, and delete functionalities

prisma/views/pos/inventory_overview.sql

@@ -0,0 +1,8 @@
+SELECT
+  `pos`.`stock_balance`.`ProductId` AS `ProductId`,
+  `pos`.`stock_balance`.`quantity` AS `stock_quantity`,
+  `pos`.`stock_balance`.`avgCost` AS `avgCost`,
+  `pos`.`stock_balance`.`totalCost` AS `totalCost`,
+  `pos`.`stock_balance`.`updatedAt` AS `updatedAt`
+FROM
+  `pos`.`stock_balance`