Gun overlays 2: Electric boogaloo. (#38003)

* Reduces selfcharge gun processing/icon work

* More efficient gun overlays, adds old_ratio var

* oh my god it was calling the egun's update_icon?

* percent proc

* Attachment overlay overhaul

* Cut overlays in egun update

* ebow 1000% better overlay management

* Update gun.dm

* Pointless check

* Giving KA and children consistent icon behavior

* Update kinetic_accelerator.dm

* Fixed

* ..() readded

* ..() readded

* ..() readded

* Antur didnt catch this one heck

* Because confusing vars are apparently more maintainable

* Gun overlays 2: Electric boogaloo

* another one

* Chameleon guns are removed

* tentacles everywhere

code/modules/projectiles/projectile/energy/chameleon.dm

@@ -1,3 +0,0 @@
-/obj/item/projectile/energy/chameleon
-	nodamage = TRUE
-