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/SimpleScript.cs

@@ -0,0 +1,58 @@
+using UnityEngine;
+using System.Collections;
+
+
+namespace TMPro.Examples
+{
+
+    public class SimpleScript : MonoBehaviour
+    {
+
+        private TextMeshPro m_textMeshPro;
+        //private TMP_FontAsset m_FontAsset;
+
+        private const string label = "The <#0050FF>count is: </color>{0:2}";
+        private float m_frame;
+
+
+        void Start()
+        {
+            // Add new TextMesh Pro Component
+            m_textMeshPro = gameObject.AddComponent<TextMeshPro>();
+
+            m_textMeshPro.autoSizeTextContainer = true;
+
+            // Load the Font Asset to be used.
+            //m_FontAsset = Resources.Load("Fonts & Materials/LiberationSans SDF", typeof(TMP_FontAsset)) as TMP_FontAsset;
+            //m_textMeshPro.font = m_FontAsset;
+
+            // Assign Material to TextMesh Pro Component
+            //m_textMeshPro.fontSharedMaterial = Resources.Load("Fonts & Materials/LiberationSans SDF - Bevel", typeof(Material)) as Material;
+            //m_textMeshPro.fontSharedMaterial.EnableKeyword("BEVEL_ON");
+
+            // Set various font settings.
+            m_textMeshPro.fontSize = 48;
+
+            m_textMeshPro.alignment = TextAlignmentOptions.Center;
+
+            //m_textMeshPro.anchorDampening = true; // Has been deprecated but under consideration for re-implementation.
+            //m_textMeshPro.enableAutoSizing = true;
+
+            //m_textMeshPro.characterSpacing = 0.2f;
+            //m_textMeshPro.wordSpacing = 0.1f;
+
+            //m_textMeshPro.enableCulling = true;
+            m_textMeshPro.textWrappingMode = TextWrappingModes.NoWrap;
+
+            //textMeshPro.fontColor = new Color32(255, 255, 255, 255);
+        }
+
+
+        void Update()
+        {
+            m_textMeshPro.SetText(label, m_frame % 1000);
+            m_frame += 1 * Time.deltaTime;
+        }
+
+    }
+}