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/Models/ProjectModels.cs

@@ -0,0 +1,141 @@
+using CodePlay.Core.Common;
+
+namespace CodePlay.Core.Models;
+
+/// <summary>
+/// 项目模型
+/// </summary>
+public class Project
+{
+    /// <summary>
+    /// 项目 ID
+    /// </summary>
+    public string Id { get; set; } = Guid.NewGuid().ToString("N");
+    
+    /// <summary>
+    /// 项目名称
+    /// </summary>
+    public string Name { get; set; } = string.Empty;
+    
+    /// <summary>
+    /// 源语言
+    /// </summary>
+    public LanguageType SourceLanguage { get; set; }
+    
+    /// <summary>
+    /// 目标语言
+    /// </summary>
+    public LanguageType TargetLanguage { get; set; }
+    
+    /// <summary>
+    /// 项目状态
+    /// </summary>
+    public ProjectStatus Status { get; set; }
+    
+    /// <summary>
+    /// 创建时间
+    /// </summary>
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    
+    /// <summary>
+    /// 更新时间
+    /// </summary>
+    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
+    
+    /// <summary>
+    /// 转换任务列表
+    /// </summary>
+    public List<ConversionTask> Tasks { get; set; } = new();
+    
+    /// <summary>
+    /// 配置
+    /// </summary>
+    public ProjectConfiguration? Configuration { get; set; }
+}
+
+/// <summary>
+/// 转换任务
+/// </summary>
+public class ConversionTask
+{
+    /// <summary>
+    /// 任务 ID
+    /// </summary>
+    public string Id { get; set; } = Guid.NewGuid().ToString("N");
+    
+    /// <summary>
+    /// 源文件路径
+    /// </summary>
+    public string SourceFilePath { get; set; } = string.Empty;
+    
+    /// <summary>
+    /// 目标文件路径
+    /// </summary>
+    public string TargetFilePath { get; set; } = string.Empty;
+    
+    /// <summary>
+    /// 源代码
+    /// </summary>
+    public string? SourceCode { get; set; }
+    
+    /// <summary>
+    /// 转换后的代码
+    /// </summary>
+    public string? TransformedCode { get; set; }
+    
+    /// <summary>
+    /// 转换状态
+    /// </summary>
+    public ConversionStatus Status { get; set; }
+    
+    /// <summary>
+    /// 创建时间
+    /// </summary>
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    
+    /// <summary>
+    /// 完成时间
+    /// </summary>
+    public DateTime? CompletedAt { get; set; }
+    
+    /// <summary>
+    /// 转换结果
+    /// </summary>
+    public ConversionResult? Result { get; set; }
+}
+
+/// <summary>
+/// 项目配置
+/// </summary>
+public class ProjectConfiguration
+{
+    /// <summary>
+    /// 验证轮次
+    /// </summary>
+    public int ValidationRounds { get; set; } = 2;
+    
+    /// <summary>
+    /// 自动修复启用
+    /// </summary>
+    public bool EnableAutoFix { get; set; } = true;
+    
+    /// <summary>
+    /// 保留注释
+    /// </summary>
+    public bool KeepComments { get; set; } = true;
+    
+    /// <summary>
+    /// 保留文档字符串
+    /// </summary>
+    public bool KeepDocStrings { get; set; } = true;
+    
+    /// <summary>
+    /// 缩进大小
+    /// </summary>
+    public int IndentSize { get; set; } = 4;
+    
+    /// <summary>
+    /// 输出目录
+    /// </summary>
+    public string? OutputDirectory { get; set; }
+}