Issue: Add Vehicle Command Missing after Refactoring

[Brandon Leon]

After a recent refactoring, the "Add Vehicle" command (vv add vehicle) has been unintentionally removed from the VehicleVitals CLI. This command is essential for users to add new vehicles to the database, and its absence disrupts the expected functionality of the tool.

Expected Behavior:
The "Add Vehicle" command (vv add vehicle) should be available in the CLI, allowing users to add new vehicles to the database as before.

Steps to Reproduce:

1. Attempt to run the "Add Vehicle" command: vv add vehicle.
2. Observe that the command is missing or produces an error.

Impact:
The absence of the "Add Vehicle" command disrupts the usability of the VehicleVitals tool, as users cannot add new vehicles to the database, which is a fundamental feature of the application.

Proposed Solution:
Reintroduce the "Add Vehicle" command (vv add vehicle) to the CLI, ensuring that it functions correctly as before.

Additional Information:
This issue was identified after a recent refactoring and should be addressed promptly to maintain the usability and functionality of the VehicleVitals tool.