[MIRROR] Adds Maltroach bar sign! [MDB IGNORE] (#24818)

* Adds Maltroach bar sign! (#79532)

## About The Pull Request
Accepted submission for the bar sign contest! It was really fun, thank
you!
Changes barsigns.dm to include information for the sign, and
barsigns.dmi to include the maltroach sign itself as well as a simple
light mask!

## Why It's Good For The Game
Mothroaches are cute and fluffy!

![RoachSign](https://github.com/tgstation/tgstation/assets/143907841/c06dcab2-eed5-45a9-8de8-7feed7dc11e4)

## Changelog
🆑
add: Maltroach bar sign!
/🆑

Co-authored-by: moth <MothLove@ protonmail.com>

* Adds Maltroach bar sign!

* Fixing modular

* Update barsigns.dm

* Putting this back for now, we'll just have to be without them

Reason being is modular icon file is 96x96

---------

Co-authored-by: MoffNyan <143907841+MoffNyan@users.noreply.github.com>
Co-authored-by: moth <MothLove@ protonmail.com>
Co-authored-by: Giz <13398309+vinylspiders@users.noreply.github.com>

code/game/machinery/barsigns.dm

@@ -1,10 +1,7 @@
 /obj/machinery/barsign // All Signs are 64 by 32 pixels, they take two tiles
 	name = "bar sign"
 	desc = "A bar sign which has not been initialized, somehow. Complain at a coder!"
-	//SKYRAT EDIT CHANGE BEGIN - BARSIGNS
-	//icon = 'icons/obj/machines/barsigns.dmi'
-	icon = 'modular_skyrat/modules/barsigns/icons/barsigns.dmi'
-	//SKYRAT EDIT CHANGE END
+	icon = 'modular_skyrat/modules/barsigns/icons/barsigns.dmi' //SKYRAT EDIT CHANGE - ORIGINAL: icon = 'icons/obj/machines/barsigns.dmi'
 	icon_state = "empty"
 	req_access = list(ACCESS_BAR)
 	max_integrity = 500
@@ -391,6 +388,12 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/barsign, 32)
 	desc = "Drink till you puke and/or break the laws of reality!"
 	neon_color = "#00cc33"
 
+/datum/barsign/maltroach
+	name = "Maltroach"
+	icon = "maltroach"
+	desc = "Mothroaches politely greet you into the bar, or are they greeting eachother?"
+	neon_color = "#649e8a"
+
 // Hidden signs list below this point
 
 /datum/barsign/hiddensigns