Refactor & More.

Changed the entity system to utilize mix-ins.

Added instanced sprites.

Texture support.

include/Game/entity/Box.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <Engine/types/entity/Entity.h>
+#include <Engine/types/entity/mixins/Movable.h>
+#include <Engine/types/entity/mixins/Renderable.h>
+
+namespace Game {
+    class Box;
+}
+
+class Game::Box final : public Engine::Entity, public Engine::Renderable, public Engine::Movable {
+public:
+    void Render() final;
+    void Update() final;
+public:
+    explicit Box(const Vector2& position, unsigned int depth = 0, float rotation = 0.0f) : Renderable(depth), Movable(position, rotation) {}
+};