Ports Goonchat from Baystation. (#9635)

changes:

    rscadd: "Ported a new chat system, Goonchat, that allows for cool things like changing font style, size, spacing, highlighting up to 5 strings in the chat, and DARK MODE."
    rscadd: "Repeated chat messages can now get compacted. You can disable this in goonchat settings."
    rscadd: "You can change icon style to any font on your system."
    tweak: "The game window has been altered a bit to adjust for this."
    rscdel: "Removed skin style prefs as they are no longer used."

code/modules/assembly/timer.dm

@@ -42,7 +42,7 @@
 		if(!secured)	return 0
 		pulse(0)
 		if(!holder)
-			visible_message("\icon[src] *beep* *beep*", "*beep* *beep*")
+			visible_message("[icon2html(src, viewers(get_turf(src)))] *beep* *beep*", "*beep* *beep*")
 		cooldown = 2
 		addtimer(CALLBACK(src, .proc/process_cooldown), 10)
 		return