Yarn: Improper names from #200 prefix -> suffix move

[Prospector]

• [x] ListMultiWidget should be MultiListWidget (though now that I think about it... I don't know what is Multi about the list at all? Either way, ListMultiWidget is not right)
• [x] SkeletonBaseEntity should be AbstractSkeletonEntity
• [x] EntityCat should be CatEntity
• [ ] Entity datafixers...there's a few https://i.imgur.com/qsdgdZm.png

[Boundarybreaker]

• [x] BlockState was incorrectly changed to StateBlock

[jamierocks]

As far as data fixers are concerned, I think they are fine.

1. They are following already specified names
2. In the absence of entity, etc packages, the prefix is justified

[Prospector]

hmm maybe. Not sure I agree though. I'd suggest make an entity package then.

[asiekierka]

I don't agree that the prefix is justified and am siding with @ProfessorProspector on this.

[liach]

PlayerServerEntity -> ServerPlayerEntity

[asiekierka]

Actually, I agree the prefix is justified. Looking into it myself now.

[SquidDev]

Possibly also

• [x] FactoryBlockEntity->BlockEntityFactory`?

[SquidDev]

A few more:

• [x] PlacementContextItem -> ItemPlacementContext
• [x] net.minecraft.server.command.OutputCommand -> CommandOutput
• [x] net.minecraft.server.command.SourceCommand -> CommandSource
• [x] EntityProviderBlock -> BlockEntityProvider. Maybe BlockEntityProviderBlock, but probably not?

💯