Monitor service documentation lacks all detail

https://fluent.docs.pyansys.com/version/stable/api/services/monitor.html#ansys.fluent.core.services.monitor.MonitorsService

Currently, this only refers to a method `get_monitors_info()`, stating that it returns a `dict`.

Open the linked Monitor service API page and inspect the documentation for MonitorsService.get_monitors_info(). Identify what the method returns and document the available detail beyond the current statement that it returns a dict. Done means the API entry explains the method sufficiently for a user to understand its result.

Written by the indexing model from the issue text.