add: fetch and display waiting time for a stop

src/components/Forms/Form-Arret-Proche.tsx

src/components/Forms/Form-Arret.tsx

src/components/Forms/Form-Waiting-Time.tsx

src/components/Formulaire.tsx

src/components/Sidebar.tsx

src/models/Horaire.model.ts

src/models/RemainingTime.model.ts

src/utils.ts