feat: 重构项目结构，添加 WPF 应用

- 将核心功能提取到 WCTDataMiner.Core 类库
- 添加 WCTDataMiner.Wpf 桌面应用
- 支持数据解析、导出、统计等功能

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/WCTDataMiner.Core/Models/QfodRecord.cs

@@ -0,0 +1,21 @@
+namespace WCTDataMiner.Core.Models;
+
+/// <summary>
+/// Qfod记录实体 - 存储Qfod格式解析数据
+/// </summary>
+public class QfodRecord
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public Guid ScenarioId { get; set; }
+    public byte ChargerIndex { get; set; }
+    public byte CoilIndex { get; set; }
+    public int DeltaQ { get; set; }
+    public float CurrentQ { get; set; }
+    public float RawQ { get; set; }
+    public byte FodType { get; set; }
+    public bool IsDeleted { get; set; } = false;
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    // Navigation Properties
+    public TestScenario Scenario { get; set; } = null!;
+}