[BREAKING] Convert RoomState's stored state map to a real map
Though the dictionary format works fine, it's slow. Access times are around the 1ms range for rooms like HQ, which doesn't seem like much, but when compared to the Map's access time of 0.05ms it's slow.
Converting things to a map means we lose index access and have to instead use `.keys()` and `.values()`, both of which return iterables and not arrays. Even doing the `Array.from()` conversion we see times in the 0.05ms range. This is also what makes this a breaking change.
Memory-wise there does not appear to be any measurable impact for a large account.