Fix MathUtils.LerpVector2, add cameras.

DaggerFramework/Source/SceneGraph/Camera2d.cs

@@ -0,0 +1,25 @@
+using System.Numerics;
+
+namespace DaggerFramework.SceneGraph;
+
+public class Camera2d : Entity2d
+{
+    public Vector2 Offset { get; set; }
+    public float Zoom { get; set; } = 1f;
+    public bool Current
+    {
+        get => _current; set
+        {
+            _current = value;
+            Layer?.UpdateCurrentCamera();
+        }
+    }
+
+    protected override void OnStart()
+    {
+        base.OnStart();
+        Offset = Renderer.WindowSize / 2;
+    }
+
+    private bool _current;
+}