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

Client/Packages/io.github.hatayama.uloopmcp/Editor/Compilation/DynamicCompilationBackend.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using UnityEditor.Compilation;
+
+namespace io.github.hatayama.uLoopMCP
+{
+    internal sealed class DynamicCompilationBackendResult
+    {
+        public CompilerMessage[] CompilerMessages { get; }
+
+        public DynamicCompilationBackendKind BackendKind { get; }
+
+        public DynamicCompilationBackendResult(
+            CompilerMessage[] compilerMessages,
+            DynamicCompilationBackendKind backendKind)
+        {
+            CompilerMessages = compilerMessages;
+            BackendKind = backendKind;
+        }
+    }
+
+    internal sealed class DynamicCompilationBackend
+    {
+        public Task<DynamicCompilationBackendResult> CompileAsync(
+            string sourcePath,
+            string dllPath,
+            List<string> references,
+            ExternalCompilerPaths externalCompilerPaths,
+            CancellationToken ct,
+            Action markBuildStarted,
+            Action markBuildFinished,
+            Action incrementBuildCount)
+        {
+            if (externalCompilerPaths != null)
+            {
+                return RoslynCompilerBackend.CompileAsync(
+                    sourcePath,
+                    dllPath,
+                    references,
+                    externalCompilerPaths,
+                    ct,
+                    markBuildStarted,
+                    markBuildFinished,
+                    incrementBuildCount);
+            }
+
+            return AssemblyBuilderFallbackCompilerBackend.CompileAsync(
+                sourcePath,
+                dllPath,
+                references,
+                ct,
+                markBuildStarted,
+                markBuildFinished,
+                incrementBuildCount);
+        }
+    }
+}