Merge from branch fill_database

Back_end/.gitignore

Back_end/public/assets/csv/adherent.csv

Back_end/public/assets/csv/depot.csv

Back_end/public/assets/csv/structure.csv

Back_end/src/Controller/AdherentController.php

Back_end/src/Controller/PointDeDepotController.php

Back_end/src/Controller/StructureController.php

Back_end/src/Entity/Adherent.php

Back_end/src/Entity/Structure.php

Back_end/src/Repository/StructureRepository.php

Back_end/templates/adherent/index.html.twig