add immovable rod event (#17278)

Resources/Locale/en-US/station-events/events/immovable-rod.ftl

@@ -0,0 +1 @@
+station-event-immovable-rod-start-announcement = High velocity unidentified object is on a collision course with the station. Impact imminent.

Resources/Prototypes/Entities/Objects/Fun/immovable_rod.yml

@@ -1,6 +1,4 @@
- # Immovable rod
-
-- type: entity
+- type: entity
   id: ImmovableRod
   name: immovable rod
   description: You can sense that it's hungry. That's usually a bad sign.
@@ -33,12 +31,32 @@
         layer:
         - Impassable
         - Opaque
+  - type: WarpPoint
+    follow: true
+    location: immovable rod
 
 - type: entity
+  parent: ImmovableRod
   id: ImmovableRodSlow
   suffix: Slow
-  parent: ImmovableRod
   components:
   - type: ImmovableRod
     minSpeed: 1
     maxSpeed: 5
+
+- type: entity
+  parent: ImmovableRod
+  id: ImmovableRodKeepTiles
+  suffix: Keep Tiles
+  components:
+  - type: ImmovableRod
+    destroyTiles: false
+    hitSoundProbability: 1.0
+
+- type: entity
+  parent: ImmovableRodKeepTiles
+  id: ImmovableRodKeepTilesStill
+  suffix: Keep Tiles, Still
+  components:
+  - type: ImmovableRod
+    randomizeVelocity: false

Resources/Prototypes/GameRules/events.yml

@@ -332,3 +332,18 @@
     maxSoundDistance: 7
     sounds:
       collection: Paracusia
+
+- type: entity
+  id: ImmovableRodSpawn
+  parent: BaseGameRule
+  noSpawn: true
+  components:
+  - type: StationEvent
+    startAnnouncement: station-event-immovable-rod-start-announcement
+    startAudio:
+      path: /Audio/Announcements/attention.ogg
+    weight: 1
+    duration: 1
+    earliestStart: 45
+    minimumPlayers: 20
+  - type: ImmovableRodRule