docs: Normalize structure: Generate IAM Policies with IAM Policy Stream

[ritoban23]

Description

Resolves issue: Add architecture diagram and testing section to IAM Policy Stream tutorial.

Changes

• Architecture Diagram Section: Added visual diagram showing the flow of S3 to SQS to IAM Policy Stream with clear component descriptions
• Testing Section: Added comprehensive testing guidance with two scenarios:
  • Deny scenario: Remove IAM policy and verify S3 cannot send messages to SQS (includes sample violation logs)
  • Allow scenario: Add IAM policy and verify S3 successfully sends messages to SQS (includes sample success logs)
  • Comparison table: Side-by-side view of expected outcomes for both scenarios

fixes #224

Files Changed

• src/content/docs/aws/tutorials/iam-policy-stream.mdx - Added Architecture diagram and Testing the application sections
• public/images/aws/iam-policy-stream-architecture.png - New architecture diagram image

Testing

• Verified MDX formatting and syntax (no errors)
• Cross-referenced with similar tutorials in the repo for consistency
• Confirmed image file exists and is properly referenced

[blkgrlcto]

Thanks so much for taking the time to submit this @ritoban23. We really appreciate your contribution, but we’ve already merged another PR that covers the same update. I’ll have to close this one to avoid duplication but please still go ahead and claim your swag as a thank-you for contributing!