Added Base_Hook::get_lib_name to track what renderer is hooked for overlay. Objects used to detect renderer type are now also used to hook the rendering functions. So we don't have to build another device. Updated VTables for DX12.
DX12 hook seems ok, there are some bugs remaining. ImGui setup for DX12 doesn't work.
Warning: DX9 doesn't support resizing (TODO), DX12 has not beed tested and is not finished. No OpenGL support for now.
