I would love to hear about any of this. I couldn't find a clear migration path with some quick googling, but I managed to eventually track down the rules I need to get mostly compatible with my org's prettier formatting.
Notably, stuff I needed was in the `javascript.formatter` section of config. But even after matching everything, Biome was wrapping lines differently. Not sure but I don't actually run the front-end show so I stopped poking at that point.