Change minibomb to be explosion resistant and start timer on damage (#32429)

* Make minibomb explosion resistant and trigger timer on damage

* Tune damage behaviour and threshold for minibomb

Content.Server/Destructible/Thresholds/Behaviors/TimerStartBehavior.cs

@@ -0,0 +1,10 @@
+namespace Content.Server.Destructible.Thresholds.Behaviors;
+
+[DataDefinition]
+public sealed partial class TimerStartBehavior : IThresholdBehavior
+{
+    public void Execute(EntityUid owner, DestructibleSystem system, EntityUid? cause = null)
+    {
+        system.TriggerSystem.StartTimer(owner, cause);
+    }
+}

Resources/Prototypes/Entities/Objects/Weapons/Throwable/grenades.yml

@@ -106,6 +106,22 @@
   components:
   - type: Sprite
     sprite: Objects/Weapons/Grenades/syndgrenade.rsi
+  - type: ExplosionResistance
+    damageCoefficient: 0.1
+  - type: Destructible
+    thresholds:
+    - trigger:
+        !type:DamageTrigger
+        damage: 10
+      behaviors:
+      - !type:TimerStartBehavior
+    - trigger:
+        !type:DamageTrigger
+        damage: 45
+      behaviors:
+      - !type:TriggerBehavior
+      - !type:DoActsBehavior
+        acts: ["Destruction"]
   - type: OnUseTimerTrigger
     delay: 5
   - type: ExplodeOnTrigger