Migrate from eslint to biome #170
Description
- Migrate as many rules as you possibly can: https://biomejs.dev/guides/migrate-eslint-prettier/
- Replace all scripts that currently use eslint to use biome check instead, with appropriate flags (--quiet is replaced with ´--diagnostic-level error` for example)
- Replace all uses in Github Actions so they use biome as well
- Try to make the formatting match the current formatting as closely as possible, so we don't introduce unnessecary changes to the code.
- Finally - remove all traces of eslint (packages, comments etc)
Make sure that tests, typechecks and of course biome linting passes.