Capsule groups are own and uniques by user

migrations/Version20220216153510.php

src/Controller/CapsuleController.php

src/Controller/CapsuleGroupController.php

src/DataFixtures/GroupFixtures.php

src/Entity/Capsule.php

src/Entity/Group.php

src/Entity/User.php

templates/capsule/groups/edit.html.twig

templates/capsule/index.html.twig