Add pr hyperlink and relative link scan job

[chensuyue]

User description

Type of Change

validation job with GHA

Description

Add pr hyperlink and relative link scan job.
Scan all the pr updated readme, raise invalid link.

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PR Type

Enhancement

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Description

• Add GitHub Actions workflow for PR link scanning

• Scan PR updated README for invalid links

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Diagram Walkthrough

flowchart LR
  A["Add GitHub Actions workflow"] -- "Scans PR README" --> B["Identify invalid links"]

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File Walkthrough

	Relevant files
Enhancement	README.md Update LLMs Recipes link                                                                  README.md Update LLMs Recipes link to relative path +1/-1      pr-link-scan.yml Add PR link scan job                                                                          .github/workflows/pr-link-scan.yml Add new workflow for PR link scanning +157/-0

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[PRAgent4INC]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Possible Issue The colspan attribute value is set to 1 for the LLMs Recipes link, which might be incorrect if the table structure expects a different colspan value. <td colspan="1" align="center"><a href="./docs/source/llm_recipes.md">LLMs Recipes</a></td>

[PRAgent4INC]

PR Code Suggestions ✨

No code suggestions found for the PR.

[chensuyue]

Those UT test failure are not related to this PR.