docs(api): Add code samples and comprehensive examples to Macros API endpoints (intercom/intercom#420117)

- Add code samples in cURL, Node.js, Python, and Ruby for both endpoints
- Expand response examples with multiple scenarios including pagination, filtering, and various macro types
- Improve error response examples with clearer messaging
- Fix tags from 'Unstable' to 'Macros' for proper categorization
- Enhance tag description for better API documentation navigation

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Co-Authored-By: Claude <[email protected]>

Author: levindixon