interface for module SPP

e2e/calculate-all-params.e2e-spec.ts

e2e/check-translations.e2e-spec.ts

e2e/clone-all-calc.e2e-spec.ts

src/app/calculators/spp/spp.config.json

src/app/calculators/spp/spp.en.json

src/app/calculators/spp/spp.fr.json

...p/components/calculator-list/calculator-list.component.ts

src/app/formulaire/definition/concrete/form-spp.ts

src/app/formulaire/fieldset.ts

src/app/formulaire/select-field.ts

src/app/services/formulaire.service.ts

src/locale/messages.en.json

src/locale/messages.fr.json