feat(backend): add responsable dashboard endpoint

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

@@ -0,0 +1,6 @@
+import { Router } from 'express';
+import { getDashboard } from '../controllers/responsable.controller';
+
+export const responsableRoutes: Router = Router();
+
+responsableRoutes.get('/dashboard', getDashboard);