#27 : simplification de la classe Field (suppression de l'enum FieldType)

src/app/components/field-set/field-set.component.html

src/app/components/field-set/field-set.component.ts

src/app/formulaire/check-field.ts

src/app/formulaire/field.ts

src/app/formulaire/input-field.ts

src/app/formulaire/select-field.ts