feat: Add product and pricing link on create and delete operations (#6740)

Things that remain to be done:
1. Handle product and variant updates
2. Add tests for the workflows independently
3. Align the endpoints to the new code conventions we defined
4. Finish up the update/upsert endpoints for variants

All of those can be done in a separate PR, as this is quite large already.

packages/types/src/pricing/common/price-set.ts

@@ -1,5 +1,5 @@
-import { BaseFilterable } from "../../dal";
-import { CreatePriceSetPriceRules } from "./price-list";
+import { BaseFilterable } from "../../dal"
+import { CreatePriceSetPriceRules } from "./price-list"
 import {
   CreateMoneyAmountDTO,
   FilterableMoneyAmountProps,