Bitrunning hotfix 3 (#78818)

## About The Pull Request
The next round of small changes to how bitrunning works - mostly from
feedback, bug reports etc.

- The loot crate delivery spot is now a buildable machine (the
byteforge), making it replaceable in the event of a disaster
- Same for netpods and quantum consoles. These boards are now
researchable and buildable.
- New icons for the byteforge and the health monitor
- Some bug fixes around despawning avatars
- Reimplements one of the bitrunning unit tests

<details>
<summary>Pictures ⬇️</summary>

Host monitor

![hostmon](https://github.com/tgstation/tgstation/assets/42397676/dc6811bc-7ce9-4eae-a91b-96975bd13c65)

Byteforge

![dreamseeker_LewhZG8bEl](https://github.com/tgstation/tgstation/assets/42397676/3071bc5f-b2c1-47d5-8a56-b0e6c216be20)

Spawning a crate

![dreamseeker_mHGSfoeMu5](https://github.com/tgstation/tgstation/assets/42397676/d5f84e91-b9bc-4bb8-8f1c-f8931154ff6d)
</details>

## Why It's Good For The Game
Bitrunning bug fixes and personal requests
Fixes #78571 
Fixes an issue reported in discord - players stuck as gondola spawn

## Changelog
🆑
fix: Added extra checks to bitrunning domain cleanup so avatars are
deleted properly.
add: Quantum servers now look for a new machine called a byteforge to
spawn loot on- no longer on an invisible landmark. This should make the
rooms rebuildable after disasters.
add: *Most* bitrunning machinery is now researchable and buildable via
circuits in the engineering protolathe.
/🆑

code/modules/bitrunning/server/util.dm

@@ -107,14 +107,14 @@
 
 	return shuffle(mutation_candidate_refs)
 
-/// Locates any turfs with crate out landmarks
-/obj/machinery/quantum_server/proc/locate_receive_turfs()
-	for(var/obj/effect/landmark/bitrunning/station_reward_spawn/spawner in GLOB.landmarks_list)
-		if(IN_GIVEN_RANGE(src, spawner, MAX_DISTANCE))
-			receive_turfs += get_turf(spawner)
-			qdel(spawner)
+/// Locates any turfs with forges on them
+/obj/machinery/quantum_server/proc/get_nearby_forges()
+	var/list/obj/machinery/byteforge/nearby_forges = list()
 
-	return length(receive_turfs) > 0
+	for(var/obj/machinery/byteforge/forge in oview(MAX_DISTANCE, src))
+		nearby_forges += forge
+
+	return nearby_forges
 
 /// Finds any mobs with minds in the zones and gives them the bad news
 /obj/machinery/quantum_server/proc/notify_spawned_threats()
@@ -132,10 +132,10 @@
 		to_chat(baddie, span_userdanger("You have been flagged for deletion! Thank you for your service."))
 
 /// Do some magic teleport sparks
-/obj/machinery/quantum_server/proc/spark_at_location(obj/crate)
-	playsound(crate, 'sound/magic/blink.ogg', 50, TRUE)
+/obj/machinery/quantum_server/proc/spark_at_location(obj/cache)
+	playsound(cache, 'sound/magic/blink.ogg', 50, TRUE)
 	var/datum/effect_system/spark_spread/quantum/sparks = new()
-	sparks.set_up(5, 1, get_turf(crate))
+	sparks.set_up(5, 1, get_turf(cache))
 	sparks.start()
 
 #undef REDACTED