feat: 完成 CodePlay 项目初始化和核心解析器实现

- 创建 CodePlay 解决方案和 4 个项目 (Core, Web, CLI, Tests)
- 实现核心数据模型 (ConversionRequest, ConversionResult, Project 等)
- 实现核心接口 (IParser, IConverter, ICodeGenerator 等)
- 实现基础抽象类 BaseParser
- 实现 CSharpParser 解析器 (基于 Roslyn)
- 添加 Microsoft.CodeAnalysis.CSharp NuGet 包
- 所有代码编译通过
Co-authored-by: monkeycode-ai <monkeycode-ai@chaitin.com>

CodePlay.Core/Common/Enums.cs

@@ -0,0 +1,120 @@
+namespace CodePlay.Core.Common;
+
+/// <summary>
+/// 支持的编程语言类型
+/// </summary>
+public enum LanguageType
+{
+    /// <summary>
+    /// 未指定
+    /// </summary>
+    None = 0,
+    
+    /// <summary>
+    /// C#
+    /// </summary>
+    CSharp = 1,
+    
+    /// <summary>
+    /// Java
+    /// </summary>
+    Java = 2,
+    
+    /// <summary>
+    /// C++
+    /// </summary>
+    CPlusPlus = 3
+}
+
+/// <summary>
+/// 转换状态
+/// </summary>
+public enum ConversionStatus
+{
+    /// <summary>
+    /// 等待中
+    /// </summary>
+    Pending = 0,
+    
+    /// <summary>
+    /// 进行中
+    /// </summary>
+    InProgress = 1,
+    
+    /// <summary>
+    /// 已完成
+    /// </summary>
+    Completed = 2,
+    
+    /// <summary>
+    /// 部分完成（需要人工检查）
+    /// </summary>
+    PartiallyCompleted = 3,
+    
+    /// <summary>
+    /// 失败
+    /// </summary>
+    Failed = 4,
+    
+    /// <summary>
+    /// 已取消
+    /// </summary>
+    Cancelled = 5
+}
+
+/// <summary>
+/// 项目状态
+/// </summary>
+public enum ProjectStatus
+{
+    /// <summary>
+    /// 进行中
+    /// </summary>
+    InProgress = 0,
+    
+    /// <summary>
+    /// 已完成
+    /// </summary>
+    Completed = 1,
+    
+    /// <summary>
+    /// 已验证
+    /// </summary>
+    Verified = 2,
+    
+    /// <summary>
+    /// 已归档
+    /// </summary>
+    Archived = 3
+}
+
+/// <summary>
+/// 验证结果状态
+/// </summary>
+public enum ValidationResult
+{
+    /// <summary>
+    /// 未验证
+    /// </summary>
+    NotValidated = 0,
+    
+    /// <summary>
+    /// 验证通过
+    /// </summary>
+    Passed = 1,
+    
+    /// <summary>
+    /// 验证失败 - 需要人工检查
+    /// </summary>
+    Failed_NeedsManualReview = 2,
+    
+    /// <summary>
+    /// 验证失败 - 编译错误
+    /// </summary>
+    Failed_CompilationError = 3,
+    
+    /// <summary>
+    /// 验证失败 - 测试失败
+    /// </summary>
+    Failed_TestFailed = 4
+}