Information about the ability to define area for dev:di:info command

### Is there an existing issue for this?

- [x] I have searched the existing issues

### What's missing?

Recently, functionality has been added to the existing dev:di:info command, allowing you to define an area scope to output information on it ( not just global ).

Ref. : https://github.com/magento/magento2/pull/38759

Start with the documentation entry for the dev:di:info command and review the behavior described in PR #38759. Document that the command can define an area scope, including how that scope changes the information output; done means the guide covers both global and area-specific usage.

Written by the indexing model from the issue text.