Make pipes leak when destroyed (#20928)

This plugs a meta where atmos techs were fireaxing pipes to remove them without leaking their contents.

Resources/Prototypes/Entities/Structures/Piping/Atmospherics/pipes.yml

@@ -21,12 +21,27 @@
   - type: Rotatable
   - type: Destructible
     thresholds:
-    - trigger:
+    - trigger: # for nukes
         !type:DamageTrigger
-        damage: 100
+        damage: 200
       behaviors:
       - !type:DoActsBehavior
         acts: ["Destruction"]
+    - trigger: # regular damage trigger (replace with broken pipe)
+        !type:DamageTrigger
+        damage: 100
+      behaviors:
+      - !type:PlaySoundBehavior
+        sound:
+          path: /Audio/Effects/metalbreak.ogg
+      - !type:SpawnEntitiesBehavior
+        spawn:
+          GasPipeBroken:
+            min: 1
+            max: 1
+        offset: 0
+      - !type:DoActsBehavior
+        acts: ["Breakage"]
   - type: Sprite
     sprite: Structures/Piping/Atmospherics/pipe.rsi
     drawdepth: ThinPipe
@@ -149,3 +164,28 @@
   - type: Construction
     graph: GasPipe
     node: fourway
+
+- type: entity
+  id: GasPipeBroken
+  parent: GasPipeBase
+  name: broken pipe
+  description: It used to hold gas.
+  components:
+  - type: Sprite
+    sprite: Structures/Piping/Atmospherics/pipe.rsi
+    drawdepth: ThinPipe
+    state: pipeBroken
+    layers:
+      - state: pipeBroken
+        map: [ "enum.PipeVisualLayers.Pipe" ]
+  - type: Construction
+    graph: GasPipe
+    node: broken
+  - type: Destructible
+    thresholds: # override parent to avoid recursive destruction
+    - trigger:
+        !type:DamageTrigger
+        damage: 100
+      behaviors:
+      - !type:DoActsBehavior
+        acts: ["Destruction"]

Resources/Prototypes/Recipes/Construction/Graphs/utilities/atmos_pipes.yml

@@ -113,3 +113,19 @@
       steps:
       - tool: Welding
         doAfter: 1
+
+  - node: broken
+    entity: GasPipeBroken
+    edges:
+    - to: start
+      conditions:
+      - !type:EntityAnchored
+        anchored: false
+      completed:
+      - !type:SpawnPrototype
+        prototype: SheetSteel1
+        amount: 1
+      - !type:DeleteEntity
+      steps:
+      - tool: Welding
+        doAfter: 1