In most other similar systems, like TeamValidator, we use `thing.dex` instead of having it extend `ModdedDex`. Battle has always extended `ModdedDex`, though. This changes Battle to match the others.
This should fix an issue with `Battle.data` not being cached.
This also frees up Battle to extend ObjectReadWriteStream<string> in a future update.
See #5415 for context - having these methods is unsafe and leads
to crashes because not all ActiveMoves are created through the
Data.ActiveMove constructor. Instead of Pokemon, these could
alternatively be static methods on ActiveMove (or the ActiveMove
class could be completely abolished and reverted back to an
interface), but #5415 will deal with ActiveMove long term, this just
fixes the crashes.
Also move mods/ to data/mods/
This makes PS more monorepo-like. The intent is to further separate
the sim and the server code, but without fully committing to splitting
the repository itself.
We now support `./pokemon-showdown start` in addition to
`./pokemon-showdown`. I'm not clear which I want to be the default
yet.
