Add Check Run report to vala-lint

[tintou]

Problem

We need to look at the output to understand what happened

Proposal

GitHub supports an inline check hint https://docs.github.com/en/rest/checks/runs?apiVersion=2022-11-28#create-a-check-run

Prior Art (Optional)

No response

[tintou]

This can now be scripted now that vala-lint gained a json mode https://github.com/vala-lang/vala-lint/commit/b4f7b455a573f97d008f1eecc32e6663ceaa990b