feat(actions): Add attio

[khaliqgant]

Describe your changes

Issue ticket number and link

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

[my-senior-dev-pr-review]

🤖 My Senior Dev

63 files reviewed • 1 high risk • 2 need attention

🚨 High Risk:

• integrations/.nango/nango.json — Defines sensitive operations for Attio integrations.

⚠️ Needs Attention:

• integrations/.nango/nango.json — Introduces significant logic changes and potential edge cases with the integration.

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