feat: initial import

Interfaces/ITarget.cs

@@ -0,0 +1,24 @@
+using R3;
+
+namespace GodotHostTest.Interfaces;
+
+/// <summary>
+/// A target for our projectiles.
+/// </summary>
+public interface ITarget
+{
+    /// <summary>
+    /// The target hasn't been hit in the allotted time and has timed out.
+    /// </summary>
+    Observable<Unit> TimedOut { get; }
+    
+    /// <summary>
+    /// The target has been hit.
+    /// </summary>
+    Observable<Unit> Hit { get; }
+
+    /// <summary>
+    /// Enable the target. Targets start disabled and gets disabled when they're hit or time out.
+    /// </summary>
+    void Enable();
+}