feat(backend): add responsable emprunts endpoint

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

@@ -1,6 +1,7 @@
 import { Router } from 'express';
-import { getDashboard } from '../controllers/responsable.controller';
+import { getDashboard, getEmprunts } from '../controllers/responsable.controller';
 
 export const responsableRoutes: Router = Router();
 
 responsableRoutes.get('/dashboard', getDashboard);
+responsableRoutes.get('/emprunts', getEmprunts);