Zombie Mode 𝓡𝓮𝓭𝓾𝔁 (#18199)

* zombie mode redux

* the great zombie changes

* fix this

* 65 down to 50

* empty

* Changes to address stalling

* make zombie nukies no longer nukies

* actually work

Resources/Prototypes/GameRules/events.yml

@@ -309,6 +309,11 @@
     weight: 2.5
     duration: 1
   - type: ZombieRule
+    minStartDelay: 0 #let them know immediately
+    maxStartDelay: 10
+    maxInitialInfected: 3 #fewer zombies
+    minInitialInfectedGrace: 300 #less time to prepare
+    maxInitialInfectedGrace: 450
 
 - type: entity
   id: LoneOpsSpawn