[DX Issue] For Headless CLI commands make it easier for users to find the schemas

### Amplify CLI Version

10.6.1

### Question

If you want to use the headless input for amplify add auth or any other categories the schemas are not in the docs, there is no "help" command to see it using the CLI tool.

To find the schemas I had to walk through the code until I found them

```
https://github.com/aws-amplify/amplify-cli/blob/dev/packages/amplify-headless-interface/schemas/auth/2/AddAuthRequest.schema.json
```

This is a lot of labour to find basic information. Please uplift this information