Convert rat king to use a ghost role spawner (#9459)

* Convert rat king to use a ghost role spawner

* fix literally unplayable spelling mistake

Resources/Prototypes/Entities/Markers/Spawners/ghost_roles.yml

@@ -0,0 +1,16 @@
+- type: entity
+  id: SpawnPointGhostRatKing
+  name: ghost role spawn point
+  suffix: rat king
+  parent: MarkerBase
+  components:
+  - type: GhostRoleMobSpawner
+    prototype: MobRatKing
+    name: Rat King
+    description: You are the Rat King, scavenge food in order to produce rat minions to do your bidding.
+    rules: You are an antagonist, scavenge, attack, and grow your hoard!
+  - type: Sprite
+    sprite: Markers/jobs.rsi
+    layers:
+      - state: green
+      - texture: Mobs/Animals/regalrat.rsi/icon.png

Resources/Prototypes/Entities/Mobs/NPCs/regalrat.yml

@@ -10,10 +10,6 @@
     baseSprintSpeed : 3.75
   - type: PlayerInputMover
   - type: PlayerMobMover
-  - type: UtilityAI
-    behaviorSets:
-    - Idle
-    - UnarmedAttackHostiles
   - type: Reactive
     groups:
       Flammable: [Touch]
@@ -71,7 +67,7 @@
     makeSentient: true
     name: Rat King
     description: You are the Rat King, scavenge food in order to produce rat minions to do your bidding.
-    rules: You are an antagonist, scavenge, attack, and grow your hoarde!
+    rules: You are an antagonist, scavenge, attack, and grow your hoard!
   - type: Tag
     tags:
       - CannotSuicide