Update create_command.py: gave '_clone_repo' function code

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>
Update create_command.py: add '-c' option

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>
Update gcli create: made '<folder>' optional

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>