### Summary
.NET 8 supports Xoroshiro 256** off the shelf and added Shuffle. Switching to that implementation.
### Developer Notes
* Removed many convenience methods that weren't used.
- [X] Caches DateTime.NowUtc on the game loop (not other threads)
- [X] Replaces all locations where it makes sense
- [X] Adds Min/Max for `IComparable` (TimeSpan, DateTimes, etc)
Closes#261
