[IMPROVEMENT] Add basic tooling

We should have some basic tools to ease the use of the project

Ideally we can gather them in a `./utils` folder

Some basic tools can be

- `generate_inventory` to create a basic inventory from a template, passing arguments to it
- `terrible`
- `up` to easily run the playbook
- `down` to shut down VMs preserving resources
- `purge` to purge a playbook
- `validate` to validate an existing playbook
- `check_deps` to check if the system meets all terrible requirements

Open to other ideas