Update directory structure for webenv design models.
- Previously, design models related to web environment images were
stored in the tcar-models-webenv directory. This organization makes
the repository nonfunctional in its pristine state. This update
moves design models related to web environment images from
tcar-models-webenv directory to Models/Webenv directory in order to
make the repository functional in its pristine state.
- The COPYING file was also removed to avoid duplicated copies of it
inside the repository.