Convert project.yaml specification to the Kubernetes CR format

### Description

Refer to the K3D project for an example:

```
apiVersion: k3d.io/v1alpha4 # API version
kind: Simple # CR kind
metadata:
  name: mycluster
servers: 1 # same as `--servers 1`
agents: 2 # same as `--agents 2`
# ...
```

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- [x] I agree to follow this project's Code of Conduct