feat(backend): expose POST /api/emprunts with departure checklist

eme-backend/src/routes/emprunt.routes.ts

@@ -1,6 +1,8 @@
 import { Router } from 'express';
-import { getMesEmprunts } from '../controllers/emprunt.controller';
+import { getMesEmprunts, postEmprunt } from '../controllers/emprunt.controller';
 
 export const empruntRoutes: Router = Router();
+empruntRoutes.post('/', postEmprunt);
 
-empruntRoutes.get('/', getMesEmprunts);
+export const mesEmpruntsRoutes: Router = Router();
+mesEmpruntsRoutes.get('/', getMesEmprunts);