Update test game to showcase camera system.

TestGame/World.cs

@@ -0,0 +1,30 @@
+using System.Numerics;
+using DaggerFramework;
+using DaggerFramework.Rendering;
+using DaggerFramework.SceneGraph;
+
+public class World : Drawable2d
+{
+    protected override void OnStart()
+    {
+        base.OnStart();
+
+        _randomPositions = new Vector2[_rectangleAmount];
+        for (int i = 0; i < _rectangleAmount - 1; i++)
+        {
+            _randomPositions[i] = MathUtils.RandomVector2(Position, Vector2.One * 2048f);
+        }
+    }
+    public override void OnDraw(Renderer renderer)
+    {
+        for (int i = 0; i < _rectangleAmount; i++)
+        {
+            renderer.SetTransform(_randomPositions[i], PivotOffset, 0);
+            renderer.DrawRectangle(Vector2.One * 16f, _rectangleColor);
+        }
+    }
+
+    private Color _rectangleColor = new Color(0.25f, 0.25f, 0.25f, 1.0f);
+    private int _rectangleAmount = 6000;
+    private Vector2[] _randomPositions;
+}