Merge branch '95-add-a-new-debug-d-option-to-makenemo-and-a-specific-fcm-flag-to-switch-more-easily-in-debug-mode' into 'main'

Resolve "add a new "debug" (-d) option to `makenemo` and a specific FCM flag to switch more easily in debug mode"

Closes #95

See merge request nemo/nemo!147