feat: implement business pricing service and money utilities

- Added `businessPricing.service.js` to handle business customer pricing logic.
- Introduced `money.js` for money parsing, formatting, and calculations.
- Created `pricing.service.js` to manage variant quoting and promotion application.
- Updated validation schemas in `catalogue.schemas.js` and `inventoryMerchandising.schemas.js` for new pricing and inventory features.
- Implemented cron job for inventory reservation expiry in `inventoryReservationExpiry.cron.js`.
- Created database migrations for catalogue and inventory structures.
- Added unit tests for catalogue localization, validation, and inventory merchandising functionalities.

tests/unit/catalogue.locale-serializer.test.js

@@ -0,0 +1,6 @@
+const {selectTranslation}=require("../../app/services/catalogue/locale.service");const {cents}=require("../../app/services/catalogue/serializer.service");
+describe("catalogue localization and money helpers",()=>{
+test("selects requested locale",()=>expect(selectTranslation([{locale:"en",name:"A"},{locale:"si",name:"B"}],"si").name).toBe("B"));
+test("falls back to English",()=>expect(selectTranslation([{locale:"en",name:"A"}],"ta").name).toBe("A"));
+test("compares decimal values without Number conversion",()=>{expect(cents("10.09")>cents("9.99")).toBe(true);expect(cents("1.5")).toBe(150n);});
+});