Add Vector2 extensions.

DaggerFramework/Source/Extensions/Vector2Extensions.cs

@@ -0,0 +1,12 @@
+using System.Numerics;
+
+namespace DaggerFramework.Extensions
+{
+    public static class Vector2Extensions
+    {
+        public static Vector2 Lerp(this Vector2 a, Vector2 b, double t)
+        {
+            return new Vector2(MathUtils.Lerp(a.X, b.X, t), MathUtils.Lerp(a.Y, b.Y, t));
+        }
+    }
+}