Add Descriptions and Docs For Cluster Config

[KPostOffice]

Name of Feature or Improvement

The documentation around the cluster configuration options is not easy for users to find and grok the features that are exposed.

Description of Problem the Feature Should Solve

Users should be able to confidently use new features exposed through the cluster configuration. (i.e. openshift_oauthproxy)

Describe the Solution You Would Like to See

Expand the documentation for ClusterConfig to include descriptions of each parameter https://github.com/project-codeflare/codeflare-sdk/blob/083a2ea8a82fab00913228e3d200b458d9e3171e/src/codeflare_sdk/cluster/config.py#L28-L32

[snalawad]

Is this something that can be picked up? I can contribute if required.