Update the authorization header format in the Gitea client. Enhance issue details in work package creation and make `number` field public in the `Issue` struct.
Reviewed-on: #2 Co-authored-by: Julien Fastré <julien.fastre@champs-libres.coop> Co-committed-by: Julien Fastré <julien.fastre@champs-libres.coop>