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/stock_view.sql

@@ -0,0 +1,18 @@
+SELECT
+  `pos`.`Stock_Movements`.`productId` AS `productId`,
+  `pos`.`Stock_Movements`.`inventoryId` AS `inventoryId`,
+  sum(
+    (
+      CASE
+        WHEN (`pos`.`Stock_Movements`.`type` = 'IN') THEN `pos`.`Stock_Movements`.`quantity`
+        WHEN (`pos`.`Stock_Movements`.`type` = 'OUT') THEN -(`pos`.`Stock_Movements`.`quantity`)
+        WHEN (`pos`.`Stock_Movements`.`type` = 'ADJUST') THEN `pos`.`Stock_Movements`.`quantity`
+        ELSE 0
+      END
+    )
+  ) AS `stock`
+FROM
+  `pos`.`Stock_Movements`
+GROUP BY
+  `pos`.`Stock_Movements`.`productId`,
+  `pos`.`Stock_Movements`.`inventoryId`