[Feature Request] Help message should show a link to the underlying REST API

**Related command**

**Is your feature request related to a problem? Please describe.**
Azure CLI internally calls REST APIs to do its job. However, the Azure CLI documentation (both in-tool and online) lacks the information of which REST APIs are called. This can only be retrieved by inspecting the `--debug` log.

Showing a link to the under API is helpful to tell:

1. The output JSON format (https://github.com/Azure/azure-cli/issues/17332)
1. The permission required to call this API (https://github.com/Azure/azure-cli/issues/22362)

**Describe the solution you'd like**
Help message should show a link to the underlying REST API.

**Describe alternatives you've considered**
Document the output JSON format and required permission, but it is very hard to maintain and synchronize with the underlying API.

**Additional context**