Add CI Job for Documentation Link Validation

[Abd-Standard]

Description

Add an automated check for broken internal documentation links.

Acceptance Criteria

The workflow is documented.

Markdown links are scanned.

Broken repository-relative links fail or warn according to project policy.

External links can be handled without making CI unnecessarily fragile.

[SHEROSE0]

@SHEROSE0 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi maintainer, I've read this description and I understood it kindly assign to me thank you

ℹ️ Repo Maintainers: To accept this application, review their application or assign @SHEROSE0 to this issue.

[Alimzy]

@Alimzy has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi! I'd like to work on this issue.

I'm a software engineer with hands-on experience in testing, debugging, and building reliable features across the stack. I'm confident I can take this on and deliver a solid, well-tested solution that follows the project's existing conventions.

I'll make sure to cover the core functionality as well as relevant edge cases to keep things reliable and regression-resistant.

Let me know if I can get started, and I'll provide updates as I progress.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Alimzy to this issue.

[richiesplug]

@richiesplug has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I’d like to take this issue. I’ve reviewed the requirements and would be happy to work on the implementation and provide a tested solution.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @richiesplug to this issue.