Setup github actions properly

[bnonni]

Right now, the only github action runs on every push to all branches. It installs the dependencies, lints, builds and builds tests. We'd like to add

• Run all tests
• Upload coverage to codecov

Additionally, it would be ideal to have multiple flows:

• non-main branch + prs into main
  • install, lint, build packages, build tests, run tests, upload coverage
• main branch
  • install, lint, build packages, build tests, run tests, upload coverage, bump versions and publish to npmjs

If you have alternative ideas that make more sense, we are open to hearing those ideas.

[aniketh-varma]

.take

[bnonni]

Thanks @aniketh-varma! This issue has been assigned to you!