More work to drivers

- Add gfx_test
- add texture loading to GfxOpenGL
- add full submit code
- add debug logging
- add construct and destroy functionality to Pool
- add command functionality
- add vertex and index pools to lithium (static and not threadsafe yet)
- Update GfxDriver Matrix with SetViewPort
- Add glfw (only dependency of gfx_test) maybe later required for input driver

include/pd/lithium/pools.hpp

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <cstddef>
+#include <pd/lithium/vertex.hpp>
+
+namespace PD {
+namespace Li {
+void InitPools(size_t max_vertices = 32768);
+Vertex* AllocateVertices(size_t count);
+u16* AllocateIndices(size_t count);
+}  // namespace Li
+}  // namespace PD