Enhancement: Ability to add sub groups using entra group member add

[milanholemans]

In the v10 major release, we renamed entra group user add to entra group member add. In addition to this change, we should also add the ability to add subgroups to an entra group. (docs)

Options to add:

Option	Description
--subGroupIds [subGroupIds]	Comma-separated list of Microsoft Entra group IDs to add. Specify either userIds, userNames, ´subGroupIds, or subGroupNames`.
--subGroupNames [subGroupNames]	Comma-separated list of Microsoft Entra group titles to add. Specify either userIds, userNames, ´subGroupIds, or subGroupNames`.

Todo:

• Add new options
• Add new option userIds in favor of ids
• Deprecate option ids
• Extra: introduce userIds and deprecate ids for command entra group user set as well