feat: ATS integration -GREENHOUSE, LEVER

[manish-singh-bisht]

Description

adds greenHouse integration
adds LEVER integration

greenhouse:basic auth
endpoints-candidates offer job department

lever:oauth
endpoints-candidates offer job department

Fixes # (issue)

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

using postman

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[vercel]

@manish-singh-bisht is attempting to deploy a commit to the OpenInt Team on Vercel.

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[github-actions]

Thank you for following the naming conventions for pull request titles! 🙏