Adds the Stealth implant, available to traitors (#21235)

* adds the stealth implant

* changes

- rename "implant" to "bio-chip"
- removes the stealth implant box in favor of spawning implant directly for the traitor
- makes the fake box not show up on right click. Makes the real box not show up on right click when invis

* sirryan pt1

* lewcc review 1

* fix conflict

* fix conflict

* signal handler

code/datums/action.dm

@@ -1,8 +1,10 @@
-#define AB_CHECK_RESTRAINED 1
-#define AB_CHECK_STUNNED 2
-#define AB_CHECK_LYING 4
-#define AB_CHECK_CONSCIOUS 8
-#define AB_CHECK_TURF 16
+#define AB_CHECK_RESTRAINED		(1<<0)
+#define AB_CHECK_STUNNED		(1<<1)
+#define AB_CHECK_LYING			(1<<2)
+#define AB_CHECK_CONSCIOUS		(1<<3)
+#define AB_CHECK_TURF			(1<<4)
+#define AB_CHECK_HANDS_BLOCKED	(1<<5)
+#define AB_CHECK_IMMOBILE		(1<<6)
 
 
 /datum/action
@@ -72,6 +74,10 @@
 /datum/action/proc/IsAvailable()// returns 1 if all checks pass
 	if(!owner)
 		return FALSE
+	if((check_flags & AB_CHECK_HANDS_BLOCKED) && HAS_TRAIT(owner, TRAIT_HANDS_BLOCKED))
+		return FALSE
+	if((check_flags & AB_CHECK_IMMOBILE) && HAS_TRAIT(owner, TRAIT_IMMOBILIZED))
+		return FALSE
 	if(check_flags & AB_CHECK_RESTRAINED)
 		if(owner.restrained())
 			return FALSE

code/datums/uplink_items/uplink_general.dm

@@ -672,6 +672,14 @@ GLOBAL_LIST_INIT(uplink_items, subtypesof(/datum/uplink_item))
 	item = /obj/item/implanter/adrenalin
 	cost = 8
 
+/datum/uplink_item/implants/stealthimplant
+	name = "Stealth Bio-chip"
+	desc = "This one-of-a-kind implant will make you almost invisible if you play your cards right. \
+			On activation, it will conceal you inside a chameleon cardboard box that is only revealed once someone bumps into it."
+	reference = "SI"
+	item = /obj/item/implanter/stealth
+	cost = 8
+
 // POINTLESS BADASSERY
 
 /datum/uplink_item/badass