Deathmatch modifiers (#81673)

## About The Pull Request
This PR adds the base to simple modifiers that the host can select to
make the minigame ~~worse~~ more entertaining for everyone.

Here's the screenshot of the UI (without a few modifiers I added later):

![immagine](https://github.com/tgstation/tgstation/assets/42542238/95bb9414-d93b-4c45-ab8a-ed8f28856018)

## Why It's Good For The Game
I've seen this minigame is frankly popular lately, so I thought I could
contribute to it.

## Changelog

🆑
add: Added 20+ modifiers to the deathmatch minigame, which can be
enabled by the host.
/🆑

code/modules/mob/living/basic/vermin/mouse.dm

@@ -63,7 +63,7 @@
 	if (tame)
 		faction |= FACTION_NEUTRAL
 	else
-		AddComponent(/datum/component/tameable, food_types = list(/obj/item/food/cheese), tame_chance = 100, after_tame = CALLBACK(src, PROC_REF(tamed)))
+		AddComponent(/datum/component/tameable, food_types = list(/obj/item/food/cheese), tame_chance = 100)
 
 /mob/living/basic/mouse/Destroy()
 	SSmobs.cheeserats -= src
@@ -148,7 +148,7 @@
 		to_chat(entered, span_notice("[icon2html(src, entered)] Squeak!"))
 
 /// Called when a mouse is hand-fed some cheese, it will stop being afraid of humans
-/mob/living/basic/mouse/proc/tamed(mob/living/tamer, obj/item/food/cheese/cheese)
+/mob/living/basic/mouse/tamed(mob/living/tamer, obj/item/food/cheese/cheese)
 	new /obj/effect/temp_visual/heart(loc)
 	faction |= FACTION_NEUTRAL
 	tame = TRUE