Add car CRUD module (routes, model, tests)
Scope
- Create/Read/Update/Delete for cars
- REST routes + simple validation
How to test
- Run: npm test (eller make test)
- Manual: POST /cars, GET /cars/:id
Risks
- Affects DB schema (cars)
- Touches auth middleware
Screenshots/CLI
- (indsæt evt. billede/udklip)