Test coverage reports in PRs

[sergeychernyshev]

Test coverage report in PR

Use https://github.com/marketplace/actions/jest-coverage-comment or https://github.com/davelosert/vitest-coverage-report-action once we switch over to vite and vitest to generate a test coverage report for each PR.

Ideally provide detailed feedback on the files that were changed and summary for overall codebase.