[Feature]: Pokemon series is a bit messy

[Die4Ever]

Summary

The original site looked like this

Split by sub-series instead of by game.

Maybe we could divide series by sub-series, and then also have randomizers with more than 5 supported games listed outside of the games and have their games listed inside the randomizer itself (like the recent updates section does). Or maybe we could do more sub-series for Pokemon, like Core GB, Core GBA, Core DS... And have the randomizers listed in each of the sub-series they apply to.

Maybe each series could have a field to specify how it is formatted? Like multi-series already has its own format but that's hardcoded, it could be a flag in the yml file.