(feat): add modal for adding a car

...kspace/garage/projects/garage-ui/src/app/app.component.ts

.../garage/projects/garage-ui/src/app/core/cars/car.store.ts

...jects/garage-ui/src/app/features/cars/cars.component.html

...rojects/garage-ui/src/app/features/cars/cars.component.ts

...c/app/features/cars/components/modal/modal.component.html

...src/app/features/cars/components/modal/modal.component.ts

...pace/garage/projects/garage-ui/src/app/shared/fa-icons.ts

garage-workspace/garage/projects/garage-ui/src/main.ts