[MIRROR] Improves the RPG loot wizard event. [MDB IGNORE] (#22800)

* Improves the RPG loot wizard event. (#77218)

## About The Pull Request
As the title says. Adds a bunch more stat changes to various different
items and a somewhat simple way of modifying them whilst minimizing
side-effects as much as possible.
Added a new negative curse of polymorph suffix that can randomly
polymorph you once you pick up the item.
Curse of hunger items won't start on items that are not on a turf.
Curse of polymorph will only activate when equipped.

Bodyparts, two-handed melees, bags, guns and grenades, to name a few,
have a bunch of type-specific stat changes depending on their quality.

Some items won't gain fantasy suffixes during the RPG loot event, like
stacks, chairs and paper, to make gamifying the stats a bit harder.
I'm sure there'll still be other ways to game the event, but it's not
that big of a deal since these are the easiest ways to game it.
High level items also have a cool unusual effect aura

## Why It's Good For The Game
Makes the RPG item event cooler. Right now, it's a bit lame since
everything only gains force value and wound bonus on attack. This makes
the statistic increases more type-based and make it interesting to use

It's okay for some items to be powerful since this is a wizard event and
a very impactful one too. By making the curse of hunger items not spawn
on people, it'll also make it a less painful event too.

## Changelog
🆑
add: Expanded the RPG loot wizard event by giving various different
items their own statistic boost.
/🆑

---------

Co-authored-by: Watermelon914 <3052169-Watermelon914@ users.noreply.gitlab.com>

* Improves the RPG loot wizard event.

---------

Co-authored-by: Watermelon914 <37270891+Watermelon914@users.noreply.github.com>
Co-authored-by: Watermelon914 <3052169-Watermelon914@ users.noreply.gitlab.com>

code/datums/components/unusual_effect.dm

@@ -0,0 +1,60 @@
+
+/particles/unusual_effect
+	icon = 'icons/effects/particles/pollen.dmi'
+	icon_state = "pollen"
+	width = 100
+	height = 100
+	count = 1000
+	spawning = 4
+	lifespan = 0.7 SECONDS
+	fade = 1 SECONDS
+	grow = -0.01
+	velocity = list(0, 0)
+	position = generator(GEN_CIRCLE, 0, 16, NORMAL_RAND)
+	drift = generator(GEN_VECTOR, list(0, -0.2), list(0, 0.2))
+	gravity = list(0, 0.95)
+	scale = generator(GEN_VECTOR, list(0.3, 0.3), list(1,1), NORMAL_RAND)
+	rotation = 30
+	spin = generator(GEN_NUM, -20, 20)
+
+/// Creates a cool looking effect on the movable.
+/// In the future, this could be expanded to have more interesting particles and effects.
+/datum/component/unusual_effect
+	dupe_mode = COMPONENT_DUPE_HIGHLANDER
+
+	var/obj/effect/abstract/particle_holder/special_effects
+
+	var/color
+
+	COOLDOWN_DECLARE(glow_cooldown)
+
+/datum/component/unusual_effect/Initialize(color, include_particles = FALSE)
+	var/atom/movable/parent_movable = parent
+	if (!istype(parent_movable))
+		return COMPONENT_INCOMPATIBLE
+
+	src.color = color
+	parent_movable.add_filter("unusual_effect", 2, list("type" = "outline", "color" = color, "size" = 2))
+	if(include_particles)
+		special_effects = new(parent_movable, /particles/unusual_effect)
+	START_PROCESSING(SSobj, src)
+
+/datum/component/unusual_effect/Destroy(force, silent)
+	var/atom/movable/parent_movable = parent
+	if (istype(parent_movable))
+		parent_movable.remove_filter("unusual_effect")
+	STOP_PROCESSING(SSobj, src)
+	return ..()
+
+/datum/component/unusual_effect/process(seconds_per_tick)
+	var/atom/movable/parent_movable = parent
+	var/filter = parent_movable.get_filter("unusual_effect")
+	if (!filter)
+		parent_movable.add_filter("unusual_effect", 2, list("type" = "outline", "color" = color, "size" = 2))
+		return
+	if(!COOLDOWN_FINISHED(src, glow_cooldown))
+		return
+
+	animate(filter, alpha = 110, time = 1.5 SECONDS, loop = -1)
+	animate(alpha = 40, time = 2.5 SECONDS)
+	COOLDOWN_START(src, glow_cooldown, 4 SECONDS)