Aquariums have now three different modes (Manual/Assisted/Stasis) (#90605)

## About The Pull Request
This PR replaces the toggleable safe mode with Manual, Assisted and
Stasis.

Manual and Stasis mode works much like the old safe mode being off and
on respectively. The real addition here is the new default assisted
mode, which automatically sets fluid and temperature based on what
combination of these two settings would keep the most fish alive. It can
also temporarily enable stasis if over half of the fish population is at
risk of dying.
The main difference with stasis is that it doesn't necessarily prevent
fish death if it's a minority of the general population, rather just
make aquarium easier for players to manage.

Also added a line about fluid and temp when examining aquariums.

Still have to test it, definitely a WIP.

## Why It's Good For The Game
I want to make aquariums a bit easier and more accessible, since the
benefits are fairly meager for the efforts needed to maintain one,
excluding the power generator. I'll probably look into fish traits and
fish reproduction next, who knows...

## Changelog

🆑
add: Aquariums can now be switched between three different modes
(Manual/Assisted/Stasis) to replace the old Safe Mode toggle.
/🆑

code/modules/mapfluff/ruins/spaceruin_code/hauntedtradingpost.dm

@@ -85,10 +85,10 @@
 /obj/structure/aquarium/donkfish
 	name = "office aquarium"
 	desc = "A home for captive fish. This one has 'DONK CO' engraved on the glass."
+	init_mode = AQUARIUM_MODE_SAFE
 
 /obj/structure/aquarium/donkfish/Initialize(mapload)
 	. = ..()
-	ADD_TRAIT(src, TRAIT_STOP_FISH_REPRODUCTION_AND_GROWTH, AQUARIUM_TRAIT)
 	new /obj/item/aquarium_prop/rocks(src)
 	new /obj/item/aquarium_prop/seaweed(src)
 	new /obj/item/fish/donkfish(src)