feat: Add AWS API Gateway REST API support to AWS-v3 integration

[github-actions[bot]]

Summary

This PR adds comprehensive support for AWS API Gateway REST APIs to the AWS-v3 integration following the established patterns and guidelines.

Changes Made

• Core Types: Added API_GATEWAY_REST_API to ObjectKind enum and apigateway to SupportedServices
• Models: Created RestApiProperties and RestApi models with all relevant API Gateway attributes
• Actions: Implemented three core actions:
  • ListRestApisAction: Processes initial list of REST APIs
  • GetRestApiDetailsAction: Fetches detailed API information with concurrent processing
  • GetRestApiTagsAction: Retrieves tags for REST APIs with proper error handling
• Exporter: Created RestApiExporter with proper ResourceInspector integration and paginated resource fetching
• Integration: Added resync handler in main.py using the standard ResyncAWSService pattern
• Port Configuration:
  • Updated .port/spec.yaml to include the new kind
  • Added comprehensive blueprint with all API Gateway properties
  • Configured default mapping with proper ARN construction

Implementation Highlights

✅ Follows AWS-v3 Guidelines: Implemented following the exact patterns outlined in ADDING_NEW_KINDS.md
✅ Concurrent Processing: Uses asyncio.gather for efficient API calls
✅ Error Handling: Proper exception handling with graceful degradation
✅ ResourceInspector Integration: Leverages the existing action orchestration framework
✅ Complete Port Integration: Full blueprint and mapping configuration
✅ ARN Construction: Proper API Gateway ARN format: arn:aws:apigateway:region::/restapis/{id}

API Gateway Properties Supported

• API ID, Name, Description, Version
• Creation date and endpoint configuration
• API key source and binary media types
• Compression settings and execute API endpoint configuration
• Policy and tags support
• Regional deployment with account relationships

Test Plan

• [ ] Integration testing with real AWS API Gateway resources
• [ ] Verify proper resource discovery and data mapping
• [ ] Test error handling with invalid/missing resources
• [ ] Confirm Port entity creation and relationships

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