feat: add hook for product category workflow

[bouazzaayyoub]

What
This commit introduces the productCategoriesCreated hook to thecreateproductcategoriesWorkflow.

Why
The hook was missing and necessary to improve the workflow's extensibility.

How
Added the productCategoriesCreated hook and updated related logic within the workflow.

Testing

Create new medusa project via create-medusa-app
Connect this custom branch of medusa to it
Create src/workflows/hooks/product-category-created.ts file with the following content:
import { createProductCategoriesWorkflow } from "@medusajs/medusa/core-flows"

createProductCategoriesWorkflow.hooks.apiKeysCreated(
(async ({ apiKeys, additional_data }, { container }) => {
console.log({apiKeys})
})
)
Create new admin account and create there a new API key
The log should be displayed in terminal

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Latest commit: 051fb05

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