ci: add GitHub Actions workflow for testing

[hamirmahal]

closes #436.

Problem

We can't tell if a change breaks tests without cloning changes locally.

How this change fixes it

CI automatically checks if tests pass, for us.

[vitonsky]

Oh i forgot we even no have tests on CI for this project. Nice work!

Btw, as i see CodeQL did not runned for this PR. Maybe because we no have changes in code (ts/js files).
Anyway, it means we have to setup CI analysis for non-code files. Any files that may affect on code execution must be analyzed, including workflow files

[hamirmahal]

Oh i forgot we even no have tests on CI for this project. Nice work!

Thanks!

[hamirmahal]

Btw, as i see CodeQL did not runned for this PR. Maybe because we no have changes in code (ts/js files). Anyway, it means we have to setup CI analysis for non-code files. Any files that may affect on code execution must be analyzed, including workflow files

It looks like the CodeQL check automatically ran on the commit merged into the main branch.