Configure Github Actions for testing

[pelme]

Currently, I run tests/type checking manually via https://github.com/pelme/htpy/blob/d4677100b595b590426bf6dc12c07c2de7944eec/scripts/test before release.

It would be nice to add pre-commit checks for ruff format/ruff check and github actions workflows for pytest, mypy and pyright. It would also be a good idea to test on differentPython versions(3.10, 3.11 and 3.12).