[feat] #314: membership: Implement display option

Add ability to send the doc after displaying the doc
Stop by-passing the license approval and the emission confirmation

Move to dry-run global option usage

Use send_doc_confirmation()
Set one confirmation prompt after the table and the document displays
Adapt the tests

Change exit status since test_membership_cmd() is sending the doc
will be fixed in #379

Add test when the two options are pass together
Add test for the display option