Add option to `create` OAS on non-greenhost VPS
The create
subcommand at the moment only supports either:
- creating from a "droplet ID" of an already existing GH VPS
- Creating a GH VPS via the API and using that one.
There should be a CLI argument that uses any other VPS. For this, you need to provide:
- IP address -- the IP address of the VPS
- Hostname -- the hostname of the VPS
The hostname is used for writing the ansible inventory. The IP address is used in the ansible inventory as well as in the playbooks.