[Docs]: Ensure availability of external resources/links

[tuunit]

📝 Description

For keeping the docs up to date and maintainable it would be great to have a mkdocs plugin/automation to check the reachability of external resources.

Ref.:
squidfunk/mkdocs-material#6640
https://pypi.org/project/mkdocs-linkcheck/

🎯 Use Case

Keeping our docs/references up to date

📎 Additional Context

No response

✅ Checklist

• I have searched existing issues
• This is not a duplicate