Completely reworks the plasma pistol, adds the dropwall shield generator (Serious) (#17556)

* oi you got a loicnse for that

* Final touches on plasma bar sound/sprite, hot drops hot drop walls

* Actually makes dropwalls good™️

* s p r i t e s and fixes

* Gives vox / drask hand gun sprites

* forgot cult shield, ICONS added with pain

* Last minute fixes and deploy coder sprites

* spacing

Co-authored-by: AffectedArc07 <25063394+AffectedArc07@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Charlie <69320440+hal9000PR@users.noreply.github.com>
Co-authored-by: SteelSlayer <42044220+SteelSlayer@users.noreply.github.com>

* Removes comments, improves deployment and sprite handling

* Removes direction_check

* Uses signals, various changes

* Final™️ changes

* Final™️ Final™️ Changes

* Final™️ Final™️ Final™️ Changes

* [insert final™️ x4 joke here]

* Final™️ Change. *6

Co-authored-by: SteelSlayer <42044220+SteelSlayer@users.noreply.github.com>

Co-authored-by: AffectedArc07 <25063394+AffectedArc07@users.noreply.github.com>
Co-authored-by: Charlie <69320440+hal9000PR@users.noreply.github.com>
Co-authored-by: SteelSlayer <42044220+SteelSlayer@users.noreply.github.com>

code/game/objects/effects/effect_system/effects_sparks.dm

@@ -13,7 +13,7 @@
 	var/datum/effect_system/spark_spread/sparks = new
 	sparks.set_up(n, c, source)
 	sparks.autocleanup = TRUE
-	sparks.start()
+	INVOKE_ASYNC(sparks, /datum/effect_system/.proc/start)
 
 /obj/effect/particle_effect/sparks
 	name = "sparks"