Fixes attempting surgery firing instead of normal actions (#19287)

Fixes surgery code from hijacking any attempt to use an item while
someone is on a bed. Rather than checking for a few allowed items, it
will now check for if the tool is meant for surgery, and only say "You
don't know what you can do" if so.

code/game/objects/items/weapons/surgery_tools.dm

@@ -18,6 +18,10 @@
 	pickup_sound = 'sound/items/pickup/weldingtool.ogg'
 	recyclable = TRUE
 
+/obj/item/surgery/Initialize(mapload, ...)
+	. = ..()
+	item_flags |= ITEM_FLAG_SURGERY
+
 /*
  * Retractor
  */