Add disabling footstep sounds and parallax to the lag switch panel (#62999)

At the last Toolbox Tournament, @MrStonedOne pointed out some big performance consumers. Some are disablable through easy means, but others were not. This adds two easy ones to the mix.

code/controllers/subsystem/lag_switch.dm

@@ -10,7 +10,7 @@ SUBSYSTEM_DEF(lag_switch)
 	/// List of bools corresponding to code/__DEFINES/lag_switch.dm
 	var/static/list/measures[MEASURES_AMOUNT]
 	/// List of measures that toggle automatically
-	var/list/auto_measures = list(DISABLE_GHOST_ZOOM_TRAY, DISABLE_RUNECHAT, DISABLE_USR_ICON2HTML)
+	var/list/auto_measures = list(DISABLE_GHOST_ZOOM_TRAY, DISABLE_RUNECHAT, DISABLE_USR_ICON2HTML, DISABLE_PARALLAX, DISABLE_FOOTSTEPS)
 	/// Timer ID for the automatic veto period
 	var/veto_timer_id
 	/// Cooldown between say verb uses when slowmode is enabled
@@ -111,6 +111,19 @@ SUBSYSTEM_DEF(lag_switch)
 				to_chat(world, span_boldannounce("Slowmode for IC/dead chat has been disabled by an admin."))
 		if(DISABLE_NON_OBSJOBS)
 			world.update_status()
+		if(DISABLE_PARALLAX)
+			if (state)
+				to_chat(world, span_boldannounce("Parallax has been disabled for performance concerns."))
+			else
+				to_chat(world, span_boldannounce("Parallax has been re-enabled."))
+
+			for (var/mob/mob as anything in GLOB.mob_list)
+				mob.hud_used?.update_parallax_pref()
+		if (DISABLE_FOOTSTEPS)
+			if (state)
+				to_chat(world, span_boldannounce("Footstep sounds have been disabled for performance concerns."))
+			else
+				to_chat(world, span_boldannounce("Footstep sounds have been re-enabled."))
 
 	return TRUE