Add linters to CI

[matthias-pichler]

Please specify parts of this PR update:

• Specification
• Schema
• Examples
• Extensions
• Use Cases
• Community
• CTK
• Other

Discussion or Issue link:

What this PR does:

I added the super-linter action to lint & format yaml and markdown files.

I also updated the contributing guide to use the same packages as super-lint. (Specifically markdown-lint instead of mdl)

And I formated and linted all files to make them compliant.

Additional information:

[ricardozanini]

The changes look good! I believe you're still working on GHA. 👍

[matthias-pichler]

The changes look good! I believe you're still working on GHA. 👍

It might actually be that super-linter is looking for the config files on the main branch and therefore can't find it 🤔

[ricardozanini]

The changes look good! I believe you're still working on GHA. 👍

It might actually be that super-linter is looking for the config files on the main branch and therefore can't find it 🤔

Maybe we can open another PR and then rebase this one?

[cdavernas]

LGTM! Thanks ❤️

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.