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

Client/Packages/io.github.hatayama.uloopmcp/Editor/Execution/DynamicCodeExecutorStub.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace io.github.hatayama.uLoopMCP
+{
+    /// <summary>
+    /// Fallback stub when no compilation provider is registered.
+    /// Returns an error for all execution attempts.
+    /// </summary>
+    public class DynamicCodeExecutorStub : IDynamicCodeExecutor
+    {
+        private readonly ExecutionStatistics _statistics;
+
+        public DynamicCodeExecutorStub()
+        {
+            _statistics = new ExecutionStatistics();
+        }
+
+        /// <summary>Execute code asynchronously (always returns a Roslyn required error)</summary>
+        public Task<ExecutionResult> ExecuteCodeAsync(
+            string code,
+            string className = DynamicCodeConstants.DEFAULT_CLASS_NAME,
+            object[] parameters = null,
+            CancellationToken cancellationToken = default,
+            bool compileOnly = false)
+        {
+            return Task.FromResult(CreateCompilationProviderUnavailableResult());
+        }
+
+        /// <summary>Retrieve execution statistics</summary>
+        public ExecutionStatistics GetStatistics()
+        {
+            return new ExecutionStatistics
+            {
+                TotalExecutions = _statistics.TotalExecutions,
+                SuccessfulExecutions = _statistics.SuccessfulExecutions,
+                FailedExecutions = _statistics.FailedExecutions,
+                AverageExecutionTime = _statistics.AverageExecutionTime,
+                SecurityViolations = _statistics.SecurityViolations,
+                CompilationErrors = _statistics.CompilationErrors
+            };
+        }
+
+        public void Dispose()
+        {
+        }
+
+        private ExecutionResult CreateCompilationProviderUnavailableResult()
+        {
+            return new ExecutionResult
+            {
+                Success = false,
+                ErrorMessage = "COMPILATION_PROVIDER_UNAVAILABLE: No compilation provider is registered. Check initialization.",
+                ExecutionTime = TimeSpan.Zero,
+                Statistics = _statistics
+            };
+        }
+    }
+}