Adds a message when trying to move while buckled (#30233)

* Shows a warning to the player trying to move while buckled.

* Adds cooldown.

* Moves the relaymove()-based message to atoms.dm

* Adds a custom buckled alert icon.

* Arranged screen_alert.dmi contents into an alphabetical order.

code/_onclick/hud/alert.dm

@@ -633,6 +633,7 @@ so as to remain in compliance with the most up-to-date laws."
 /obj/screen/alert/restrained/buckled
 	name = "Buckled"
 	desc = "You've been buckled to something. Click the alert to unbuckle unless you're handcuffed."
+	icon_state = "buckled"
 
 /obj/screen/alert/restrained/handcuffed
 	name = "Handcuffed"
@@ -698,4 +699,3 @@ so as to remain in compliance with the most up-to-date laws."
 	severity = 0
 	master = null
 	screen_loc = ""
-

code/game/atoms.dm

@@ -29,6 +29,7 @@
 	var/list/priority_overlays	//overlays that should remain on top and not normally removed when using cut_overlay functions, like c4.
 
 	var/datum/proximity_monitor/proximity_monitor
+	var/buckle_message_cooldown = 0
 
 /atom/New(loc, ...)
 	//atom creation method that preloads variables at creation
@@ -292,7 +293,10 @@
 			to_chat(user, "Nothing.")
 	SendSignal(COMSIG_PARENT_EXAMINE, user)
 
-/atom/proc/relaymove()
+/atom/proc/relaymove(mob/user)
+	if(buckle_message_cooldown <= world.time)
+		buckle_message_cooldown = world.time + 50
+		to_chat(user, "<span class='warning'>You can't move while buckled to [src]!</span>")
 	return
 
 /atom/proc/contents_explosion(severity, target)

code/game/objects/buckling.dm

@@ -62,7 +62,7 @@
 	M.setDir(dir)
 	buckled_mobs |= M
 	M.update_canmove()
-	M.throw_alert("buckled", /obj/screen/alert/restrained/buckled, new_master = src)
+	M.throw_alert("buckled", /obj/screen/alert/restrained/buckled)
 	post_buckle_mob(M)
 
 	return TRUE
@@ -131,5 +131,3 @@
 				"<span class='italics'>You hear metal clanking.</span>")
 		add_fingerprint(user)
 	return M
-
-