doc: licence information

Improve GPLv3 licence information like here https://lab.frogg.it/lydra/yunohost/ansible-yunohost/-/tree/main#license You can see an exemple here

• add icon/logo and little texte in readme

• add licence file

• add Lydra Copyright https://gitlab.com/lydra/gitlab-ci-templates/-/blob/master/LICENSE#L634

• https://choosealicense.com/licenses/gpl-3.0/

• https://www.gnu.org/licenses/quick-guide-gplv3.html

added To Do label

assigned to @julie_thezenas

changed the description

changed the description

changed the description

created merge request !1 (merged) to address this issue

mentioned in merge request !1 (merged)

added Doing label and removed To Do label

added Need review label and removed Doing label

marked the checklist item add icon/logo and little texte in readme as completed

marked the checklist item add licence file as completed

marked the checklist item add Lydra Copyright https://gitlab.com/lydra/gitlab-ci-templates/-/blob/master/LICENSE#L634 as completed

closed with commit afd6f175