Additional API helpers from wrench (regarding groups, tags, ...)

[drzraf]

Wrench Passbolt Python cli provided some helpers than currently available in this project.

Namely:

• share_resource
• get_users
• get_user
• get_groups
• get_group
• add_resource
• get_resource_permissions
• add_tags

If wrench were to rely upon passbolt-python-api for low-level operations (which would be nice), it'd be handy if the above helpers were also provided here (eg: get_groups, get_group, get_user, add_tag, ...)