this makes just about everything easily accessible via commands.
There are some stuff that shouldn't be here due to not being actual items (e.g. door blocks, bed blocks, wall coral fans) but since there were legacy aliases for all those things already, I figured what the heck - it's more effort to exclude them, so whatever.
this isn't specced up with some of the finer features of LegacyStringToItemParser such as metadata parsing, but those are still a work in progress (and probably limited to specific items like durable stuff).
The goal is to unbind these aliases from legacy internal IDs, while also providing a nice flexible way for plugins to add their own items and aliases to the existing system.
This system allows mapping a string to any item at all, irrespective of state, internal IDs, or any of that nonsense. This means it's finally possible to have stuff like lapis_lazuli and bone_meal aliases in commands.
