feat: ROI 对齐工具与 TM_Result 位姿扩展

- Core: Pose2D、Point2D、RoiAlignment、AlignmentRecipe（示教多边形→运行图刚体变换）

- Processors: TemplateMatchAlignmentExtensions.ToPose2D / 四角与中心一致性校验

Co-authored-by: Cursor <cursoragent@cursor.com>

XP.ImageProcessing.Core/Alignment/Point2D.cs

@@ -0,0 +1,4 @@
+namespace XP.ImageProcessing.Core.Alignment;
+
+/// <summary>图像像素平面上的点（与 WPF/Emgu 解耦）。</summary>
+public readonly record struct Point2D(double X, double Y);