Add functionality seeking debug version of 3rdparty libraries.
If debug ones were not found, the release are used instead.
Use standard functionality to find draco.
Added new CMake variables to build using DRACO
Windows OS works with Debug and Release configuration DRACO
Linux works with Release configuration DRACO
Added new optional dependency - Draco library.
RWGltf_GltfJsonParser now detects KHR_draco_mesh_compression extension,
marks accessor being compressed and redirects to compressed buffer view.
RWGltf_TriangulationReader now handles decoding of buffer view compressed using Draco.
env.bat template for genproj has been modified to allow specifying dedicated folders
with debug versions of libraries (CSF_OPT_LIB64D / CSF_OPT_BIN64D) within custom.bat.
Removed unused CSF_FREETYPE from TKOpenGl.
