[MIRROR] Portals now have a colorful glow [MDB IGNORE] (#22888)

* Portals now have a colorful glow (#77298)

## About The Pull Request

Most instances of /obj/effect/portal now faintly glow their respective
color.

![image](https://github.com/tgstation/tgstation/assets/28870487/3044b435-d4e7-4ba5-86f9-ca6f9e4415c1)

This was taken in the dark, the glow isn't as noticeable in the light.

Anomaly/jaunter/mech wormholes do not glow, since they use the
black-and-grey swirly sprite and don't look like they'd emit any kind of
light.

Also autodocs some portal related vars and changes one proc to not use
single char vars.

I also tried adding a soundloop but it sounded kind of crappy so I
decided against it.
## Why It's Good For The Game

Makes the portals a little bit prettier :)
## Changelog
🆑 Rhials
qol: Most of the colored oval-shaped portals faintly glow now. Cool!
/🆑

* Portals now have a colorful glow

---------

Co-authored-by: Rhials <28870487+Rhials@users.noreply.github.com>

code/modules/mining/equipment/wormhole_jaunter.dm

@@ -101,6 +101,7 @@
 	desc = "A stable hole in the universe made by a wormhole jaunter. Turbulent doesn't even begin to describe how rough passage through one of these is, but at least it will always get you somewhere near a beacon."
 	mech_sized = TRUE //save your ripley
 	innate_accuracy_penalty = 6
+	light_on = FALSE
 
 /obj/effect/portal/jaunt_tunnel/teleport(atom/movable/M)
 	. = ..()