ag CLI is deprecated, should migrate the usage to AsyncAPI CLI

[tianshu-orcl]

Deprecation of ag CLI: The ag CLI is deprecated in favour of the AsyncAPI CLI that is a single entry point for all the AsyncAPI tools. No new features will be added to ag and it will be completely removed. The official documentation of AsyncAPI Generator has not mentioned ag for over a year, instead only using AsyncAPI CLI and asyncapi generate fromTemplate commands. Refer to the migration guide that will help you understand how to migrate your ag commands to the new AsyncAPI CLI command.