Field of Vision component. (#12075)

* Hopeless WIP for vision cones.

* Core component and hooks done

* Removing clutter.

* linter bashing me for using statements as args.

* Ok.

* continue

* bring back the macro

* Configs and openspace filter.

* Chat plane, reset perspective signal, mechs/vehicles cases, machineries.

* view, viewers and spoopy ghosts.

* Renamed component, admin fun button and snowflakes robots.

* Whoopsie.

* Yikes

* test merge tweak.

* radial yaketi sax.

* Fixed tgui UIs, some messages not displayed to the target.

* Documentation and a little bugfix.

* Pulling QoL, seventh plane made in this PR.

* Fix.

* Tweaks and improvements.

* Update randomverbs.dm

code/game/objects/structures/mirror.dm

@@ -4,6 +4,7 @@
 	desc = "Mirror mirror on the wall, who's the most robust of them all?"
 	icon = 'icons/obj/watercloset.dmi'
 	icon_state = "mirror"
+	plane = ABOVE_WALL_PLANE
 	density = FALSE
 	anchored = TRUE
 	max_integrity = 200