[ready] adds unit test for missing inhand icons. fixes a bunch of missing inhand icons (#70037)

fix: Fixed a bunch of missing inhand icons.
fix: Fixed cables in electrical toolboxes not randomizing their colors.
fix: Fixed the wrong colored icon showing when trying to make cable cuffs out of cables.
fix: The collectable SWAT helmet is now using the proper icon again!
refactor: Pipecleaners and power cables now share a unified color system, so they're once again available in ALL the same colors.
imageadd: Updated the screwdriver belt overlay to represent the newer sprite.
imageadd: Added a bunch of new inhand icons. Special thanks to Twaticus for doing the helmets! <3
fix: Wirecutters now have an icon when inside a belt again!
admin: Added a new omnitool subtype that allows you to spawn all items in a typepath!
fix: Explorer gaskmasks now properly reflect their adjusted state when held.
fix: Fixed balaclavas having the wrong icon when pulled up.
fix: Fixed the base energy sword (admin spawn only) being invisible.
fix: The rainbow energy sword is now a little bit more rainbowy!
fix: Fixed an tk exploit with orange handcuffed shoes.
fix: The traitor outfit in the select equipment panel is now actually functional!

code/game/objects/items/tools/crowbar.dm

@@ -3,6 +3,7 @@
 	desc = "A small crowbar. This handy tool is useful for lots of things, such as prying floor tiles or opening unpowered doors."
 	icon = 'icons/obj/tools.dmi'
 	icon_state = "crowbar"
+	inhand_icon_state = "crowbar"
 	lefthand_file = 'icons/mob/inhands/equipment/tools_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/tools_righthand.dmi'
 	usesound = 'sound/items/crowbar.ogg'
@@ -30,6 +31,7 @@
 
 /obj/item/crowbar/red
 	icon_state = "crowbar_red"
+	inhand_icon_state = "crowbar_red"
 	force = 8
 
 /obj/item/crowbar/abductor

code/game/objects/items/tools/wirecutters.dm

@@ -9,6 +9,9 @@
 	righthand_file = 'icons/mob/inhands/equipment/tools_righthand.dmi'
 
 	greyscale_config = /datum/greyscale_config/wirecutters
+	greyscale_config_belt = /datum/greyscale_config/wirecutters_belt_overlay
+	greyscale_config_inhand_left = /datum/greyscale_config/wirecutter_inhand_left
+	greyscale_config_inhand_right = /datum/greyscale_config/wirecutter_inhand_right
 
 	flags_1 = CONDUCT_1
 	slot_flags = ITEM_SLOT_BELT

code/game/objects/items/tools/wrench.dm

@@ -3,6 +3,7 @@
 	desc = "A wrench with common uses. Can be found in your hand."
 	icon = 'icons/obj/tools.dmi'
 	icon_state = "wrench"
+	inhand_icon_state = "wrench"
 	worn_icon_state = "wrench"
 	lefthand_file = 'icons/mob/inhands/equipment/tools_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/tools_righthand.dmi'
@@ -32,7 +33,6 @@
 	name = "alien wrench"
 	desc = "A polarized wrench. It causes anything placed between the jaws to turn."
 	icon = 'icons/obj/abductor.dmi'
-	icon_state = "wrench"
 	belt_icon_state = "wrench_alien"
 	custom_materials = list(/datum/material/iron = 5000, /datum/material/silver = 2500, /datum/material/plasma = 1000, /datum/material/titanium = 2000, /datum/material/diamond = 2000)
 	usesound = 'sound/effects/empulse.ogg'
@@ -43,6 +43,7 @@
 	name = "medical wrench"
 	desc = "A medical wrench with common(medical?) uses. Can be found in your hand."
 	icon_state = "wrench_medical"
+	inhand_icon_state = "wrench_medical"
 	force = 2 //MEDICAL
 	throwforce = 4
 	attack_verb_continuous = list("heals", "medicals", "taps", "pokes", "analyzes") //"cobbyed"
@@ -85,6 +86,7 @@
 	name = "combat wrench"
 	desc = "It's like a normal wrench but edgier. Can be found on the battlefield."
 	icon_state = "wrench_combat"
+	inhand_icon_state = "wrench_combat"
 	belt_icon_state = "wrench_combat"
 	attack_verb_continuous = list("devastates", "brutalizes", "commits a war crime against", "obliterates", "humiliates")
 	attack_verb_simple = list("devastate", "brutalize", "commit a war crime against", "obliterate", "humiliate")