implemented SDL3 as an option for window manager

TSE_OpenGlImpl/src/RenderTextureCreatorOpenGL.hpp

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "interfaces/IRenderTexture.hpp"
+#include "RenderTexture.hpp"
+
+namespace TSE::OpenGL
+{
+    class RenderTextureCreatorOpenGL : public IRenderTextureCreator
+    {
+    public:
+        inline IRenderTexture* CreateTextureHeap(Vector2 v, uint textureCount = 1) override
+        {
+            return new RenderTexture(v, textureCount);
+        };
+    };
+} // namespace OpenGL