Make some coins lucky. (#33886)

* Make some minted coins lucky.

* Added shiny overlay for potentially lucky coins.

code/modules/mining/ores_coins.dm

@@ -398,6 +398,17 @@
 	pixel_x = rand(-8, 8) * PIXEL_MULTIPLIER
 	pixel_y = rand(-8, 0) * PIXEL_MULTIPLIER
 	add_component(/datum/component/coinflip)
+	if (prob(1))
+		// Something about this coin stands out...
+		luckiness_validity = LUCKINESS_WHEN_GENERAL_RECURSIVE
+		overlays += image('icons/obj/items.dmi', "shine")
+		if (prob(20))
+			// Sometimes it's very lucky!
+			luckiness = 500 * credits
+		else
+			// But most of the time, it's just our imagination.
+			luckiness = 0
+
 
 /obj/item/weapon/coin/recycle(var/datum/materials/rec)
 	if(material==null)
@@ -534,6 +545,11 @@
 	else
 		..()
 
+/obj/item/weapon/coin/examine(mob/user)
+	..()
+	if(!isnull(luckiness))
+		to_chat(user, "<span class='notice'>Something is [pick("peculiar", "exceptional", "interesting")] about it...</span>")
+
 ///////////////////////////////////////////////////////////
 
 /obj/item/weapon/coin/pomf