Use Biome for linting and formatting

[Jokauppi]

Here's a branch to preview and play around with Biome. Feel free to try stuff out and commit.

Seems pretty good to me with a longer line length.

• Configured Biome
• Husky and lint-staged were installed but there was no Husky config. Changed these to lefthook. Wrote a few different hooks to choose if wanted.
• Removed ESlint and Prettier
• Had to disable some Biome recommended rules to get linting to succeed without --apply-unsafe
  • I think some of these are inconvenient like useTemplate, noUselessElse and noForEach
  • Seems like we are using quite a few double equals, these should be reviewed/removed. Odd that the eslint/recommended didn't complain about these.
  • Biome disallows CJS by default so disabled related rules. Can be enabled after:
    • Migrate to esmodules #112

[ArktinenKarpalo]

Are there conflicts with eslint or why was it removed? At least some time ago there were some lint rules that were in eslint but not in biom. It could be useful to use both linters if eslint has some additional rules and there are no bad conflicts/other issues. However I don't know if the situation has improved since, maybe using biomes linter is enough.

[Jokauppi]

There are all eslint:recommended rules not available in biome. Most if not all of these are not needed because they are not applicable in ES6/ESM, Biome disables a related pattern (e.g. var) or because the pattern is handled by Biome formatting.

eslint:recommended rules not available in biome
no-constant-binary-expression
no-delete-var
no-dupe-else-if
no-empty-static-block
no-invalid-regexp
no-irregular-whitespace
no-octal
no-sparse-arrays
no-unexpected-multiline
no-useless-backreference
no-useless-escape