Allow setting name for custom/headless outputs

[phonetic112]

Title. For some reason the compiler gave errors when I tried to get the return of wlr_x11_output_create so I can't name the x11 outputs I guess.

Example:

$ hyprctl output create headless hello
Monitor WL-1 (ID 0):
	1183x1026@144.00000 at 0x0
	description: 
	make: 
	model: 
	serial: 
	active workspace: 1 (1)
	special workspace: 0 ()
	reserved: 0 0 0 0
	scale: 1.00
	transform: 0
	focused: yes
	dpmsStatus: 1
	vrr: 1
	activelyTearing: false
	disabled: false
	currentFormat: XRGB8888
	availableModes: 

Monitor hello (ID 1):
	1920x1080@144.00000 at 1183x0
	description: 
	make: 
	model: 
	serial: 
	active workspace: 2 (2)
	special workspace: 0 ()
	reserved: 0 0 0 0
	scale: 1.00
	transform: 0
	focused: no
	dpmsStatus: 1
	vrr: 0
	activelyTearing: false
	disabled: false
	currentFormat: XRGB8888
	availableModes: 

[vaxerski]

x11 backend is disabled, thats why

[vaxerski]

thanks!