Add CI check for broken links

[onasser1]

What type of PR is this?
/kind feature

What this PR does / why we need it:
This PR uses lychee checker to scan links in docs directory in the codebase to detect broken/dead links during CI checks.
Which issue(s) this PR fixes:
Fixes #12104

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: onasser1
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[k8s-ci-robot]

Hi @onasser1. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[onasser1]

Hi @yankay 👋🏻 can you review this PR if you've capacity please?

[VannTen]

This doesn't add any check in CI from what I can see ?
(Fixing broken link is welcome, but maybe you're missing another commit which wasn't pushed ?)

[onasser1]

This doesn't add any check in CI from what I can see ? (Fixing broken link is welcome, but maybe you're missing another commit which wasn't pushed ?)

Yup sorry, I forgot to push the workflow commit.

[yankay]

/ok-to-test

[onasser1]

/ok-to-test

seems like it's a system failure. can we re-test or I've to change something?

https://gitlab.com/kargo-ci/kubernetes-sigs-kubespray/-/jobs/13235070821

[tico88612]

/retest