REFACTOR: moving articles

FAQ_articles/general/84-acheter-un-logiciel-libre.md

...tlab/107-gitlab-donner-acces-seulement-sur-inscription.md

...giciels/gitlab/108-premiers-pas-sur-le-gitlab-adullact.md

...nos-services/106-premiers-pas-sur-le-comptoir-du-libre.md

...nt-enregistrer-un-nouveau-projet-sur-la-forge-adullact.md

...ices/forge/20-comment-s-inscrire-sur-la-forge-adullact.md

...ervices/forge/59-premiers-pas-pour-une-formation-forge.md

FAQ_articles/nos-services/forge/_index.md

FAQ_articles/premiers-pas/_index.md

FAQ_articles/technique/18-comment-liberer-mon-logiciel.md

...technique/60-comment-aborder-une-migration-bureautique.md

FAQ_articles/usages/_index.md