Adds a hypnotic flashbang to the uplink (#49137)

Adds a hypnotic flashbang, disguised as a regular flashbang, to the traitor/nuke op uplink. Pretty much an AoE one-use hypnotic flash, but it doesn't require weakening the targets as long as they can be affected by the sound of the grenade, since it causes minor hallucinations.
Why It's Good For The Game

Effectively this is a non-lethal, non-destructive chaos-making tool. Even without the hypnosis it's a better flashbang; if everything goes right you've got a roomful of followers obeying your orders, but on the other hand something might go wrong, and then Poly is the one with the roomful of followers.
Changelog

🆑
add: Added a hypnotic flashbang to the uplink for 12 TC. It can hypnotize people much like a hypnoflash, and the sound will automatically make victims vulnerable to the trance.
/🆑

code/modules/uplink/uplink_items.dm

@@ -1369,6 +1369,12 @@ GLOBAL_LIST_INIT(uplink_items, subtypesof(/datum/uplink_item))
 	item = /obj/item/assembly/flash/hypnotic
 	cost = 7
 
+/datum/uplink_item/device_tools/hypnotic_grenade
+	name = "Hypnotic Grenade"
+	desc = "A modified flashbang grenade able to hypnotize targets. The sound portion of the flashbang causes hallucinations, and will allow the flash to induce a hypnotic trance to viewers."
+	item = /obj/item/grenade/hypnotic
+	cost = 12
+
 /datum/uplink_item/device_tools/medgun
 	name = "Medbeam Gun"
 	desc = "A wonder of Syndicate engineering, the Medbeam gun, or Medi-Gun enables a medic to keep his fellow \