Reorganize source files into logical subdirectories

Co-authored-by: Hirek193 <23196899+Hirek193@users.noreply.github.com>

rendering/opengllight.h

@@ -0,0 +1,29 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+#pragma once
+
+#include "light.h"
+
+struct opengl_light : public basic_light {
+
+    GLuint id { (GLuint)-1 };
+
+    void
+        apply_intensity( float const Factor = 1.0f );
+    void
+        apply_angle();
+
+    opengl_light &
+        operator=( basic_light const &Right ) {
+            basic_light::operator=( Right );
+            return *this; }
+};
+
+//---------------------------------------------------------------------------