[IMP] developer: new CLI commands and improvements

Added the existing `deploy`, `obfuscate`, `upgrade_code` commands.
Reviewed titles to make the commands stand out in the ToC.

task-4866527

fixes #14046
backport of ef7efd6

closes #15516

X-original-commit: 62c3abb
Signed-off-by: Julien Castiaux (juc) <juc@odoo.com>

Author: Julien00859