ci: Added workflow for checking broken links in Markdown files

[Rohini-Microsoft]

This pull request adds a new GitHub Actions workflow to check for broken links in markdown files. The workflow is designed to run on pull requests and manual triggers, ensuring that markdown files are free of broken links.

Workflow addition:

.github/workflows/broken-links-checker.yml: Introduced a new workflow named "Broken Link Checker" that uses the lychee-action to validate links in markdown files. It checks only changed markdown files for pull requests and all markdown files for manual triggers.

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information

[github-actions]

🎉 This PR is included in version 2.1.0 🎉

The release is available on GitHub release

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