Throws gangtools into a bottomless pit (#82145)

## About The Pull Request

Resprites everything that used to use the old gangtool sprites (door
remotes, augment choice beacon, landing zone designators, and nuke op
borg spawners.)


![image](https://github.com/tgstation/tgstation/assets/5479091/346d4a1b-59cc-47c3-b6ff-b66c75d7730b)

- Added a new non-gangtool generic choice beacon, and a specific
S.E.L.F. one.
- Door remotes are now fancy garage door openers.
- Landing designators have cannibalised the cell phone sprites from the
less old version of gang.
- Nuke op borg spawners use the same walkie talkie as other
reinforcements

Door remotes now have individual sprites for each mode, so you can see
the mode at a glance.

## Why It's Good For The Game

Having a range of very different items sharing the same old sprites is
pretty confusing, better to have them all be unique and up to date.

## Changelog
🆑
image: Everything that used the old gangtool sprites (door remotes,
landing field designators, some choice beacons, windicate borg
reinforcements) has been resprited.
image: Door remotes now visibly show their current mode.
/🆑

code/modules/mining/aux_base.dm

@@ -257,8 +257,8 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/computer/auxiliary_base, 32)
 /obj/item/assault_pod/mining
 	name = "Landing Field Designator"
 	icon = 'icons/obj/devices/remote.dmi'
-	icon_state = "gangtool-purple"
-	inhand_icon_state = "electronic"
+	icon_state = "designator_mining"
+	inhand_icon_state = "minertalkie"
 	lefthand_file = 'icons/mob/inhands/items/devices_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/items/devices_righthand.dmi'
 	desc = "Deploy to designate the landing zone of the auxiliary base."