Autowiki for fishing. (#86035)

## About The Pull Request
I've come to realize manually updating all fishing stuff on the very
much outdated wiki would be a colossal pain in the rear, so I've decided
to automate a few bits to generate autowiki lists containing information
about fish, fish traits, bait, hooks, reels, fishng rods, fish sources
and fish experiments.

Now tested.

## Why It's Good For The Game
Making a huge autowiki for a feature that's being constantly updated (by
me) but still has a particularly lame and outdated page on the wiki.

## Changelog
N/A

code/modules/unit_tests/fish_unit_tests.dm

@@ -84,6 +84,7 @@
 	fish_traits = list(/datum/fish_trait/dummy)
 	stable_population = INFINITY
 	breeding_timeout = 0
+	show_in_catalog = FALSE //skipped by the autowiki unit test.
 
 /obj/item/fish/testdummy/two
 	fish_traits = list(/datum/fish_trait/dummy/two)