feat: Revamp of product categories (#7695)

* feat: Normalize the categories interface to match standards

* feat: Revamp the product category implementation

* fix: Adjustments to code and tests around product categories

packages/core/utils/src/dal/mikro-orm/mikro-orm-repository.ts

@@ -241,11 +241,15 @@ export class MikroOrmBaseTreeRepository<
     throw new Error("Method not implemented.")
   }
 
-  create(data: unknown, context?: Context): Promise<T> {
+  create(data: unknown[], context?: Context): Promise<T[]> {
     throw new Error("Method not implemented.")
   }
 
-  delete(id: string, context?: Context): Promise<void> {
+  update(data: unknown[], context?: Context): Promise<T[]> {
+    throw new Error("Method not implemented.")
+  }
+
+  delete(ids: string[], context?: Context): Promise<void> {
     throw new Error("Method not implemented.")
   }
 }