You can now interact with held mobs beside wearing them (feat: "minor" melee attack chain cleanup) (#90080)

People can now pet held mothroaches and pugs if they want to, or use
items on them, hopefully without causing many issues. After all, it only
took about a couple dozen lines of code to make...

...Oh, did the 527 files changed or the 850~ lines added/removed perhaps
catch your eye? Made you wonder if I accidentally pushed the wrong
branch? or skewed something up big time? Well, nuh uh. I just happen to
be fed up with the melee attack chain still using stringized params
instead of an array/list. It was frankly revolting to see how I'd have
had to otherwise call `list2params` for what I'm trying to accomplish
here, and make this PR another tessera to the immense stupidity of our
attack chain procs calling `params2list` over and over and over instead
of just using that one call instance from `ClickOn` as an argument. It's
2025, honey, wake up!

I also tried to replace some of those single letter vars/args but there
are just way too many of them.

Improving old code. And I want to be able to pet mobroaches while
holding them too.

🆑
qol: You can now interact with held mobs in more ways beside wearing
them.
/🆑

code/modules/tutorials/tutorials/drop.dm

@@ -18,8 +18,8 @@
 	QDEL_NULL(drop_preview)
 	return ..()
 
-/datum/tutorial/drop/perform(list/params)
-	create_drop_preview(params[SCREEN_LOC])
+/datum/tutorial/drop/perform(list/modifiers)
+	create_drop_preview(modifiers[SCREEN_LOC])
 	addtimer(CALLBACK(src, PROC_REF(show_instructions)), TIME_TO_START_MOVING_DROP_ICON)
 
 	RegisterSignal(user, COMSIG_MOB_DROPPING_ITEM, PROC_REF(on_dropped_item))

code/modules/tutorials/tutorials/switch_hands.dm

@@ -25,8 +25,8 @@
 
 	return ..()
 
-/datum/tutorial/switch_hands/perform(list/params)
-	create_hand_preview(params[SCREEN_LOC])
+/datum/tutorial/switch_hands/perform(list/modifiers)
+	create_hand_preview(modifiers[SCREEN_LOC])
 	addtimer(CALLBACK(src, PROC_REF(show_instructions)), TIME_TO_START_MOVING_HAND_ICON)
 
 	RegisterSignal(user, COMSIG_MOB_SWAP_HANDS, PROC_REF(on_swap_hands))