feat: add workday-cc untested functions

[viictoo]

Describe your changes

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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
• I followed the best practices and guidelines from the Writing Integration Scripts doc

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Summary by cubic

Add workday-cc integration using Workday Staffing API v6 with actions and syncs for workers, positions, organizations, locations, and job profiles. Schemas are added to integrations/.nango/nango.json and modules registered in integrations/index.ts and internal/flows.zero.json.

• New Features
  • Actions: get-* and list-* for job profiles, locations, organizations, positions, workers.
  • Syncs: employees, groups, job-profiles, locations, organizations, positions, workers.
  • Pagination via cursor and basic retries; outputs validated with zod.
  • API constraints handled: locations via prompt values, supervisory orgs only, positions modeled as jobs, limited worker fields.

^{Written for commit 17c7938. Summary will update on new commits.}