Updated to latest version of nzombies

Updated to most recent version of NZR

- Added Lobby settings
- Fixed a nav issue

- Massive overall optimization and functionality update
- Fixed missing asset near the evacuation building
- Rebalanced spawns
- Made Richtofen easter egg harder (also revised the steps, check discussions)
- Fixed an issue with the Maxis easter egg
- Removed certain redundant map entities (leftover doors and soulboxes that didn't do anything)
- Fixed a bug where you could use a pack-a-punched ballistic knife to get both easter eggs early and at the same time
- Removed a few mismatching weapons from the mystery box
- Made optional performance mode more aggressive
- Minor visual improvements
- Added a secret teleporter to the spire in-case your trample steams glitch out, which previously made completing the easter egg impossible (although I think the trample steam glitch has been fixed in the most recent update of the nzombies buildables mod, but better safe than sorry better safe than sorry better safe than sorry

- Bug fixes
- Optimization