fix(cx-api): adding missing readme

[IkeNefcy]

Issue

Closes #33866

Reason for this change

#33729 missing readme update for cx-api

Description of changes

added readme

aws-cdk/packages/aws-cdk-lib/cx-api/README.md

Lines 662 to 681 in eae1d4f

	* `@aws-cdk/aws-events:requireEventBusPolicySid`
	When this flag is enabled:
	- Resource policies will be created with Statement IDs for service principals
	- The operation will succeed as expected
	When this flag is disabled:
	- A warning will be emitted
	- The grant operation will be dropped
	- No permissions will be added
	_cdk.json_
	```json
	{
	"context": {
	"@aws-cdk/aws-events:requireEventBusPolicySid": true
	}
	}
	```

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[aws-cdk-automation]

(This review is outdated)

[IkeNefcy]

Exemption Request for both, it's saying this because I added the comment wall back in
//////////////////////////////////////////////////////////////////////

[IkeNefcy]

although it didn't say it for this PR lol strange #33796

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.38%. Comparing base (8e4374f) to head (2de5569).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #33867   +/-   ##
=======================================
  Coverage   82.38%   82.38%           
=======================================
  Files         120      120           
  Lines        6938     6938           
  Branches     1170     1170           
=======================================
  Hits         5716     5716           
  Misses       1119     1119           
  Partials      103      103           

Flag	Coverage Δ
suite.unit	82.38% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
packages/aws-cdk	∅ <ø> (∅)
packages/aws-cdk-lib/core	82.38% <ø> (ø)

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[IkeNefcy]

@GavinZZ I think it needs the exemption tags to move on

✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

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Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 2de5569
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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