Initial commit

srcs/RobotNet10/Shared/RobotNet10.NavigationTune.Shared/Models/Pose2D.cs

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+namespace RobotNet10.NavigationTune.Shared.Models;
+
+/// <summary>
+/// 2D Pose (position + heading)
+/// </summary>
+public struct Pose2D
+{
+    public double X { get; set; }
+    public double Y { get; set; }
+    public double Theta { get; set; } // radians
+
+    public Pose2D(double x, double y, double theta)
+    {
+        X = x;
+        Y = y;
+        Theta = theta;
+    }
+
+    public static double Distance(Pose2D a, Pose2D b)
+    {
+        double dx = b.X - a.X;
+        double dy = b.Y - a.Y;
+        return Math.Sqrt(dx * dx + dy * dy);
+    }
+}
+
+/// <summary>
+/// 2D Twist (linear + angular velocity)
+/// </summary>
+public struct Twist2D
+{
+    public double Linear { get; set; }   // m/s
+    public double Angular { get; set; }  // rad/s
+
+    public Twist2D(double linear, double angular)
+    {
+        Linear = linear;
+        Angular = angular;
+    }
+}