Enhancement: Add more options to `spo user get`

[milanholemans]

Let's add the following options to the command spo user get:

Option	Description
--userName [userName]	User's UPN (user principal name, eg. [email protected]). Specify either id, loginName, email, userName, entraGroupId, or entraGroupName.
--entraGroupId [entraGroupId]	The object ID of the Microsoft Entra group. Specify either id, loginName, email, userName, entraGroupId, or entraGroupName.
--entraGroupName [entraGroupName]	The name of the Microsoft Entra group. Specify either id, loginName, email, userName, entraGroupId, or entraGroupName.

[Adam-it]

LGTM. One comment, lets use entraGroupId and entraGroupName. the same like we have in spo user remove. Lets open it up 👍

[milanholemans]

Issue became a bit outdated indeed @Adam-it, thanks for checking.

[SmitaNachan]

Can I work on it?