feat: basic MonoGame integration implementations added

Engine.Integration/Engine.Integration.MonoGame/Behaviours/SpriteBatcher.cs

@@ -0,0 +1,31 @@
+using System.Collections.Generic;
+
+using Microsoft.Xna.Framework.Graphics;
+
+using Syntriax.Engine.Core;
+
+namespace Syntriax.Engine.Integration.MonoGame;
+
+public class SpriteBatcher : BehaviourBase, IFirstFrameUpdate, IDraw
+{
+    private static Comparer<IBehaviour> SortByPriority() => Comparer<IBehaviour>.Create((x, y) => y.Priority.CompareTo(x.Priority));
+    private SpriteBatch spriteBatch = null!;
+    private MonoGameCamera2DBehaviour camera2D = null!;
+    private readonly ActiveBehaviourCollectorSorted<IDrawableSprite> drawableSprites = new() { SortBy = SortByPriority() };
+
+    public void FirstActiveFrame()
+    {
+        MonoGameWindowContainer windowContainer = BehaviourController.UniverseObject.Universe.FindRequiredBehaviour<MonoGameWindowContainer>();
+        camera2D = BehaviourController.UniverseObject.Universe.FindRequiredBehaviour<MonoGameCamera2DBehaviour>();
+
+        spriteBatch = new(windowContainer.Window.GraphicsDevice);
+    }
+
+    public void Draw()
+    {
+        spriteBatch.Begin(transformMatrix: camera2D.MatrixTransform);
+        for (int i = 0; i < drawableSprites.Count; i++)
+            drawableSprites[i].Draw(spriteBatch);
+        spriteBatch.End();
+    }
+}