chore(unity): 固定Unity CLI Loop本地包并移除UnitySkills依赖

Client/Packages/io.github.hatayama.uloopmcp/Editor/Api/McpTools/Ping/PingTool.cs

@@ -0,0 +1,29 @@
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace io.github.hatayama.uLoopMCP
+{
+    /// <summary>
+    /// Ping tool handler - Type-safe implementation using Schema and Response
+    /// Connection test and message echo functionality
+    /// </summary>
+    [McpTool(
+        DisplayDevelopmentOnly = true,
+        Description = "Connection test and message echo"
+    )]
+    public class PingTool : AbstractUnityTool<PingSchema, PingResponse>
+    {
+        public override string ToolName => "ping";
+
+        protected override Task<PingResponse> ExecuteAsync(PingSchema parameters, CancellationToken cancellationToken)
+        {
+            // Type-safe parameter access - no more string parsing!
+            string message = parameters.Message;
+            string response = $"Unity MCP Bridge received: {message}";
+
+            // Create type-safe response
+            PingResponse pingResponse = new PingResponse(response);
+            return Task.FromResult(pingResponse);
+        }
+    }
+}