The Glitterening (#92226)

## About The Pull Request

Adds a number of new capabilities to glitter.

- It can be any colour.
<img width="657" height="398" alt="image"
src="https://github.com/user-attachments/assets/60e80c04-8eee-470c-8953-47f6eda9f83e"
/>

- It can be made in chemistry and dyed by combining it with acetone and
other reagents to give it the average colour of the non-glitter,
not-acetone reagents.
- Multiple colours can be mixed into one reagent datum, randomly
depositing a colour from those in the datum on the floor.
<img width="554" height="507" alt="image"
src="https://github.com/user-attachments/assets/9cc7d1d5-9bec-4b28-af06-310ffb24de49"
/>

- Anyone with glitter reagent in them will cough glitter onto the floor
- Glittery crates will leave a trail of appropriately coloured glitter
when moved
<img width="960" height="259" alt="image"
src="https://github.com/user-attachments/assets/71cc1176-23f9-4ae7-b500-1744b752c014"
/>

Resprited glitter to support these changes and make it not look like gas
(or ass).

## Why It's Good For The Game

It looks cool and raises the bar for chemists maximally pissing off the
janitor as they fill a room with multicoloured glitter and all the
occupants run off to cough more up all over the surrounding area.

## Changelog
🆑
add: Glitter can now be made from plastic polymers and aluminium.
add: Plastic polymer can be made at any temperature, and then heated to
produce sheets.
add: Glitter can now be made any colour, mix 10 units each of glitter
and acetone to change its colour to that of the other reagents in the
beaker.
add: Mixing different colours of glitter will cause a random selection
of those colours to appear on the floor when released.
add: Being exposed to glitter in reagent form causes you to cough up
more glitter onto the floor
add: Dragging glittery crates will now spread a trail of glitter and
angry janitors behind them.
image: Added new glitter sprites (that don't look like gasses)
/🆑

tools/UpdatePaths/Scripts/92226_glitterening.txt

@@ -0,0 +1,6 @@
+/obj/item/grenade/chem_grenade/glitter/white : /obj/item/grenade/chem_grenade/glitter{@OLD}
+/obj/structure/closet/crate/pink : /obj/structure/closet/crate/glitter{@OLD}
+/obj/structure/closet/crate/lavender : /obj/structure/closet/crate/glitter/lavender{@OLD}
+/obj/effect/decal/cleanable/glitter/white : /obj/effect/decal/cleanable/glitter{@OLD}
+/obj/effect/decal/cleanable/glitter/pink : /obj/effect/decal/cleanable/glitter{@OLD;color="ff8080"}
+/obj/effect/decal/cleanable/glitter/blue : /obj/effect/decal/cleanable/glitter{@OLD;color="4040ff"}