feat: add Unity 6 client with 2.5D visual system

Unity client features:
- WebSocket connection via NativeWebSocket
- 2.5D agent visuals with programmatic placeholder sprites
- Billboard system for sprites and UI elements
- Floating UI panels (name, HP, energy bars)
- Speech bubble system with pop-in animation
- RTS-style camera controller (WASD + scroll zoom)
- Editor tools for prefab creation and scene setup

Scripts:
- NetworkManager: WebSocket singleton
- GameManager: Agent spawning and event handling
- AgentVisual: 2.5D sprite and UI creation
- Billboard: Camera-facing behavior
- SpeechBubble: Animated dialogue display
- CameraController: RTS camera with UI input detection
- UIManager: HUD and command input

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

unity-client/Assets/TextMesh Pro/Examples & Extras/Scripts/EnvMapAnimator.cs

@@ -0,0 +1,35 @@
+using UnityEngine;
+using System.Collections;
+using TMPro;
+
+public class EnvMapAnimator : MonoBehaviour {
+
+    //private Vector3 TranslationSpeeds;
+    public Vector3 RotationSpeeds;
+    private TMP_Text m_textMeshPro;
+    private Material m_material;
+    
+
+    void Awake()
+    {
+        //Debug.Log("Awake() on Script called.");
+        m_textMeshPro = GetComponent<TMP_Text>();
+        m_material = m_textMeshPro.fontSharedMaterial;
+    }
+
+    // Use this for initialization
+	IEnumerator Start ()
+    {
+        Matrix4x4 matrix = new Matrix4x4(); 
+        
+        while (true)
+        {
+            //matrix.SetTRS(new Vector3 (Time.time * TranslationSpeeds.x, Time.time * TranslationSpeeds.y, Time.time * TranslationSpeeds.z), Quaternion.Euler(Time.time * RotationSpeeds.x, Time.time * RotationSpeeds.y , Time.time * RotationSpeeds.z), Vector3.one);
+             matrix.SetTRS(Vector3.zero, Quaternion.Euler(Time.time * RotationSpeeds.x, Time.time * RotationSpeeds.y , Time.time * RotationSpeeds.z), Vector3.one);
+
+            m_material.SetMatrix("_EnvMatrix", matrix);
+
+            yield return null;
+        }
+	}
+}