feat(calendly): Add users syncs/actions

[arealesramirez]

Describe your changes

Add the following endpoints to the Calendly integration

Syncs

• Users

Actions

• create-user
• delete-user

Note: I wasn't able to run successful tests for create-user and delete-user actions due to lack of permissions.

Issue ticket number and link

N/A

Checklist before requesting a review (skip if just adding/editing APIs & templates)

• I added tests, otherwise the reason is:
• External API requests have retries
• Pagination is used where appropriate
• The built in nango.paginate call is used instead of a while (true) loop
• Third party requests are NOT parallelized (this can cause issues with rate limits)
• If a sync requires metadata the nango.yaml has auto_start: false
• If the sync is a full sync then track_deletes: true is set