Replace eslint + prettier with biome

[jankapunkt]

Until we 100% resolved the #279 conflict we get stuck in eslint at 8.5 and it wont get better. At the same time Biome is stable at 2.x.

Biome has the advantage, that it handles multiple code quality features in one tool and comes with all necessary rules for linting and formatting included, reducing (dev-) dependencies dramatically.

If there is agreement, then I would open a PR, migrating to Biome by doing the following:

• remove eslint and their config files
• add biome
• create a config that is as close as possible to our current setup
• apply lint / format fixes
• replace ci linting step, if necessary

[HappyZombies]

@jankapunkt i am for it, personally never heard of it but I'll give it a try soon to familiarize myself with it.

If this is the path you think we need to get to ESM, then so be it!