Add a capsule group

migrations/Version20220208141756.php

migrations/Version20220208145209.php

src/Builder/CapsuleBuilder.php

src/Builder/UserBuilder.php

src/Controller/.gitignore

src/Controller/CapsuleController.php

src/Controller/CapsuleEditorController.php

src/Controller/CapsuleGroupController.php

src/Controller/FallbackController.php

src/Controller/ProjectController.php

src/Controller/RegistrationController.php

src/Controller/ResetPasswordController.php

src/Controller/SecurityController.php

src/Controller/UserController.php

src/Curl/CurlHandle.php

src/DataFixtures/CapsuleFixtures.php

src/DataFixtures/UserFixtures.php

src/Entity/.gitignore

src/Entity/Capsule.php

src/Entity/Group.php