Kicks Martial Arts out of the attack chain (yippee), makes it use signals, plus a large clean up of existing martial arts (#81097)

## About The Pull Request

- Kicks Martial Arts out of the attack chain. 
- All Martial Arts attacks are now handled via unarmed attack or grab
signals
- This means all martial arts are now technically on the living level,
allowing any mob that can unarmed attack to martial arts. Sort of. YMMV.

- All martial arts block checking is now handled by the arts themselves,
meaning you can selectively decide for a martial arts strike to not be
blocked. Maybe good for the future.

- A comprehensive cleanup of all existing martial arts. Improving var
names, code, adding some missing animation calls, etc.

Fixes #74829

## Why It's Good For The Game

Untangles the mess that is martial arts, making it a lot easier to work
with the attack chain and making it overall a ton more consistent.

## Changelog

🆑 Melbert
refactor: Big martial arts refactor, they should now overall act a ton
more consistent. Also technically any mob can do martial arts. Let me
know if something is funky.
/🆑

---------

Co-authored-by: Ghom <42542238+Ghommie@users.noreply.github.com>

code/game/objects/items/implants/implant_krav_maga.dm

@@ -3,7 +3,7 @@
 	desc = "Teaches you the arts of Krav Maga in 5 short instructional videos beamed directly into your eyeballs."
 	icon = 'icons/obj/scrolls.dmi'
 	icon_state ="scroll2"
-	var/datum/martial_art/krav_maga/style = new
+	var/datum/martial_art/krav_maga/style
 
 /obj/item/implant/krav_maga/get_data()
 	var/dat = {"<b>Implant Specifications:</b><BR>
@@ -13,17 +13,23 @@
 				<b>Function:</b> Teaches even the clumsiest host the arts of Krav Maga."}
 	return dat
 
+/obj/item/implant/krav_maga/Initialize(mapload)
+	. = ..()
+	style = new()
+	style.allow_temp_override = FALSE
+
+/obj/item/implant/krav_maga/Destroy()
+	QDEL_NULL(style)
+	return ..()
+
 /obj/item/implant/krav_maga/activate()
 	. = ..()
-	var/mob/living/carbon/human/H = imp_in
-	if(!ishuman(H))
+	if(isnull(imp_in.mind))
 		return
-	if(!H.mind)
+	if(style.fully_remove(imp_in))
 		return
-	if(H.mind.has_martialart(MARTIALART_KRAVMAGA))
-		style.remove(H)
-	else
-		style.teach(H,1)
+
+	style.teach(imp_in, TRUE)
 
 /obj/item/implanter/krav_maga
 	name = "implanter (krav maga)"