update readme with unit test, cfn synthesis test and aws integ test instructions

[sid88in]

Update readme with testing instructions

Summary by CodeRabbit

• Documentation
  • Refreshed README badge block with updated All Contributors count (now showing 93) and improved HTML formatting for badge containers
  • Added Testing section detailing three test tiers: unit tests with npm/jest commands, end-to-end CloudFormation synthesis tests, and AWS integration tests with environment variable configuration and region/profile setup instructions

[coderabbitai]

📝 Walkthrough

Walkthrough

README badges are now wrapped in HTML <p> containers with an updated contributor count (93). A new Testing section documents the three test tiers: unit tests, e2e CloudFormation synthesis, and AWS integration tests, including exact npm/jest commands and environment variable setup.

Changes

README Documentation Updates

Layer / File(s)	Summary
Badge styling and contributor count README.md	Badges wrapped in HTML <p> containers; All Contributors badge updated from 69 to 93 contributors.
Testing documentation README.md	New Testing section documents three test layers: unit tests, e2e CloudFormation synthesis, and AWS integration tests, with run commands, coverage details, AWS region/profile setup, and references to detailed test documentation.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Poem

🐰 Badges now shine in HTML wraps so neat,
And testing docs make knowledge complete—
Unit, e2e, and integration flows,
With commands and env vars all neatly composed! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title accurately describes the main change: updating the README with testing instructions for unit tests, CloudFormation synthesis tests, and AWS integration tests, which aligns with the actual additions to the README.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch update/readme

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_{Comment @coderabbitai help to get the list of available commands and usage tips.}