chore: clean up workshop subscription schema and add subscribed workshops field

- Removed unnecessary line breaks in the workshop subscription schema for improved readability.
- Consolidated import statements for better organization.
- Added a new field `subscribedWorkshops` to retrieve a list of workshops the current user is subscribed to, enhancing the schema's functionality.
- Streamlined error handling in the subscription logic for clarity.

.npmrc

@@ -1 +1 @@
-node-options=--experimental-require-module
+node-options=--experimental-require-module