feat(product, types, modules-sdk): added event bus events for products (#4654)

what:

- adds an eventbus dependency to product module.
- emits events on product, category and collection CUD

RESOLVES CORE-1450

.changeset/fuzzy-tables-build.md

@@ -0,0 +1,7 @@
+---
+"@medusajs/product": patch
+"@medusajs/types": patch
+"@medusajs/modules-sdk": patch
+---
+
+feat(product,types): added event bus events for products