feat: add Unity BT debugger and node naming support (#45)

* feat: add Unity BT debugger and node naming support

Add an in-Editor Behaviour Tree debugger window and runtime glue to support visualization and node naming.

- Add BehaviourTreeDebuggerWindow (Editor) that visualizes behaviour trees at runtime: node layout, state colors, active path highlighting, evaluation order, and play-mode refresh/selection handling.
- Add BehaviourTreeMono (Runtime) base MonoBehaviour to create and expose a BehaviourTree instance on Awake.
- Add Name property and SetName(string) to INode, BehaviourNode, BehaviourRoot and EmptyBehaviourNode so nodes expose readable names (defaulting to type name) for the debugger.
- Include Unity .meta files for the new Editor/Runtime files.

These changes enable runtime inspection of behaviour trees in the Unity Editor and ensure nodes provide names for clearer visualization.

* feat: add Name and SetName to test nodes

Add a Name property and SetName(string) method stubs to the test node/root classes across the unit tests to satisfy an updated INode/IRoot interface. The Name property returns an empty string and SetName is a no-op in most test classes (TestRoot's SetName throws NotImplementedException). Updates apply to multiple files under tests/GroveGames.BehaviourTree.Tests (Composites, Decorators, RootTests, TreeTests) to prevent compilation errors after the interface change.

Author: GencerG

src/GroveGames.BehaviourTree.Unity/Packages/com.grovegames.behaviourtree/Editor/BehaviourTreeDebuggerWindow.cs

@@ -0,0 +1,19 @@
+using GroveGames.BehaviourTree.Collections;
+using UnityEngine;
+
+namespace GroveGames.BehaviourTree.Unity
+{
+    public abstract class BehaviourTreeMono : MonoBehaviour
+    {
+        protected BehaviourTree _tree;
+        public BehaviourTree Tree => _tree;
+
+        protected abstract BehaviourTree CreateTree(Blackboard blackboard);
+
+        protected virtual void Awake()
+        {
+            var blackboard = new Blackboard();
+            _tree = CreateTree(blackboard);
+        }
+    }
+}

src/GroveGames.BehaviourTree.Unity/Packages/com.grovegames.behaviourtree/Editor/BehaviourTreeDebuggerWindow.cs.meta

@@ -7,11 +7,18 @@ public abstract class BehaviourNode : INode
     public static readonly INode Empty = new EmptyBehaviourNode();
 
     private IParent _parent = null!;
+    private string _name;
     protected NodeState _nodeState;
 
     protected IParent Parent => _parent;
     public IBlackboard Blackboard => _parent.Blackboard;
     public NodeState State => _nodeState;
+    public string Name => _name;
+
+    public BehaviourNode()
+    {
+        _name = GetType().Name;
+    }
 
     public virtual void SetParent(IParent parent)
     {
@@ -42,4 +49,8 @@ public virtual void EndEvaluate()
     {
 
     }
+    public void SetName(string name)
+    {
+        _name = name;
+    }
 }

src/GroveGames.BehaviourTree.Unity/Packages/com.grovegames.behaviourtree/Runtime/BehaviourTreeMono.cs

@@ -7,14 +7,17 @@ public sealed class BehaviourRoot : IRoot
     private readonly IBlackboard _blackboard;
     private INode _child;
     private NodeState _nodeState;
+    private string _name;
 
     public IBlackboard Blackboard => _blackboard;
     public NodeState State => _nodeState;
+    public string Name => _name;
 
     public BehaviourRoot(IBlackboard blackboard)
     {
         _blackboard = blackboard;
         _child = BehaviourNode.Empty;
+        _name = GetType().Name;
     }
 
     public NodeState Evaluate(float deltaTime)
@@ -64,4 +67,9 @@ public void SetParent(IParent parent)
     {
 
     }
+
+    public void SetName(string name)
+    {
+        _name = name;
+    }
 }

src/GroveGames.BehaviourTree.Unity/Packages/com.grovegames.behaviourtree/Runtime/BehaviourTreeMono.cs.meta

@@ -4,6 +4,8 @@ public sealed class EmptyBehaviourNode : INode
 {
     public NodeState State => NodeState.Failure;
 
+    public string Name => string.Empty;
+
     public NodeState Evaluate(float deltaTime)
     {
         return NodeState.Failure;
@@ -33,4 +35,9 @@ public void SetParent(IParent parent)
     {
 
     }
+
+    public void SetName(string name)
+    {
+
+    }
 }

src/GroveGames.BehaviourTree/Nodes/BehaviourNode.cs

@@ -8,5 +8,7 @@ public interface INode
     public void StartEvaluate();
     public void EndEvaluate();
     public void SetParent(IParent parent);
+    public void SetName(string name);
     public NodeState State { get; }
+    public string Name { get; }
 }

src/GroveGames.BehaviourTree/Nodes/BehaviourRoot.cs

@@ -50,6 +50,8 @@ private sealed class TestNode : INode
         public int ResetCallCount { get; private set; }
         public NodeState State { get; set; } = NodeState.Success;
 
+        public string Name => string.Empty;
+
         public NodeState Evaluate(float deltaTime) => State;
 
         public void Reset()
@@ -61,6 +63,10 @@ public void Abort() { }
         public void StartEvaluate() { }
         public void EndEvaluate() { }
         public void SetParent(IParent parent) { }
+
+        public void SetName(string name)
+        {
+        }
     }
 
     [Fact]

src/GroveGames.BehaviourTree/Nodes/EmptyBehaviourNode.cs

@@ -21,12 +21,18 @@ private sealed class TestNode : INode
         public NodeState ReturnState { get; set; } = NodeState.Success;
         public NodeState State => ReturnState;
 
+        public string Name => string.Empty;
+
         public NodeState Evaluate(float deltaTime) => ReturnState;
         public void Reset() { }
         public void Abort() { }
         public void StartEvaluate() { }
         public void EndEvaluate() { }
         public void SetParent(IParent parent) { }
+
+        public void SetName(string name)
+        {
+        }
     }
 
     private sealed class TestParent : IParent