RandomChance trigger condition (#39543)

* branch names don't matter anyway

* commits are a window to the soul

* requested change

* also requested

* ship it

* remove key

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Co-authored-by: iaada <iaada@users.noreply.github.com>

Content.Shared/Trigger/Components/Conditions/RandomChanceTriggerConditionComponent.cs

@@ -0,0 +1,16 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Trigger.Components.Conditions;
+
+/// <summary>
+/// This condition will cancel triggers based on random chance.
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+public sealed partial class RandomChanceTriggerConditionComponent : BaseTriggerConditionComponent
+{
+    /// <summary>
+    /// Chance for the trigger to succeed.
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public float SuccessChance = .9f;
+}