Add bounds hazards and triggers

src/SideScrollerGame.Sim/Definitions/TriggerDefinition.cs

@@ -0,0 +1,20 @@
+using System.Diagnostics.CodeAnalysis;
+
+namespace SideScrollerGame.Sim.Definitions;
+
+[ExcludeFromCodeCoverage]
+public sealed record TriggerDefinition
+{
+    public TriggerDefinition(string id, AxisAlignedBounds bounds, string kind)
+    {
+        Id = id;
+        Bounds = bounds;
+        Kind = kind;
+    }
+
+    public string Id { get; init; }
+
+    public AxisAlignedBounds Bounds { get; init; }
+
+    public string Kind { get; init; }
+}