Generate the CLI docs

[artberger]

Update the existing Helm & API docs workflow or create a new one to automatically update the CLI docs for:

• kagent
• kmcp

Resources:

• Existing API & Helm workflow: https://github.com/kagent-dev/website/blob/main/.github/workflows/update-ref-docs.yaml
• kagent CLI source: https://github.com/kagent-dev/kagent/blob/main/go/cli/cmd/kagent/main.go
• kmcp CLI source: https://github.com/kagent-dev/kmcp/tree/main/cmd