Documentation for built-in system admin tools for new Desktop category

Would be nice to populate the new Desktop focused category of docs at docs.r.o with Guides/Tips for using built-in (and 3rd party) GUI tools for completing Sys. Admin tasks.

As an example, the rough requirements draft for a Guide/doc covering user/group management on RL systems using a built-in GUI tool might include the following:

• Show how to create/manage new users/groups on a RL workstation using ONLY GUI tools

• Whenever possible, the guide should cover (expose?) as many of the important salient points/features covered by the CLI counter-parts tools (e.g useradd) and also exposed in the GUI.

• 1st guide might cover using built-in tools like "gnome control center". Ditto something similar for KDE DE env.

• Subsequent or future guides can cover other popular 3rd party tools for doing similar things

• Guides should feature 1 - 3 screenshots of the most important aspect of the tool/process (e.g. attached screenshot)

• Include extra tips for using or launching the tool from the CLI e.g. gnome-control-center user-accounts

• Some of the initial set of built-in and out-of-the-box GUI Rocky system management tools that we can create documentation for are shown in this output :

$ gnome-control-center  -l

Available panels:
	applications
	background
	bluetooth
	camera
	color
	datetime
	default-apps
	diagnostics
	display
	info-overview
	keyboard
	location
	lock
	microphone
	mouse
	multitasking
	network
	wifi
	notifications
	online-accounts
	power
	printers
	region
	removable-media
	search
	sharing
	sound
	thunderbolt
	universal-access
	usage
	user-accounts
	wacom
	wwan