Unique fishing loot tables for each biome

From 1.14 you can fish bamboo in jungle biomes, and... that's it, they never did anything else with the concept of biome-specific fishing loot.

So here are some suggestions:

- Have fish chances be determined by biome; salmon would be catchable in rivers and most land biomes, as well as frozen and cold oceans and beaches, other fish would only be catchable in their respective ocean biomes.

- In Badlands biomes, should yield a small chance of gold nuggets as a treasure item (reference to gold panning);

- When glow squid eventually get added, there should be a chance to catch glow ink sacs in whatever biome they spawn in;

- This might double as a mob suggestion, but in caves (and other places where fish don't naturally spawn, such as The End), troglobites/cavefish should be the only fish able to be catched.