Add CI

[zamazan4ik]

Hi!

Currently, no CI is avaiable (at least in public). And it is not easy to understand, does a PR breaks something or not.

Please add a CI to the repo. E.g. based on GitHub Actions CI or maybe integrate somehow reports from your internal CI system.

Thanks.

[zamazan4ik]

Seems like now CI works for the PRs (I see proper badges). Thanks!