Add tropical fish support

[Snow-Pyon]

Target Minecraft versions: 1.13+
Requirements: N/A
Related issues: #1385
Description:
Adds support for tropical fish, which should add support for every entity once #1486 is merged.

This wasn't tested yet (I bet it doesn't even compile, I'll fix that later), I've made it just to receive input about how it is handled as soon as possible.

[ShaneBeee]

Hey snow.. Just wanted to suggest the plural of blockfish and clayfish should be ¦es instead of ¦s

[Snow-Pyon]

@ShaneBeee good catch. To be honest, I automatized it with a python script since I didn't want to manually write the pattern for every type so that's why it's that way.

[ShaneBeee]

Hey snow... so I did some testing
using:

command /test:
	trigger:
		spawn tropical fish at player

This was the outcome:
https://hastebin.com/ezexiqezip.md

[Nicofisi]

@ShaneBeee ... the outcome was an empty page on a paste service that deletes the pastes after some time - could you please repost it on https://gist.github.com and use it next time 👀 <3

[Blueyescat]

I applied the changes to 2.3-beta1 because i had issues with 2.3-alpha1, and the code @ShaneBeee send just works as expected. It spawns random tropical fishes with random colors.

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Using the other fishes than tropical fish without specifying their two colors throws NPE: https://gist.github.com/Blueyescat/38a15043bb2c3ec1960077f651e12254

using "%color% <fish>" (not "fully %color%"): https://gist.github.com/Blueyescat/244e8cfc877cb5fca330b5ecc54af297

spawn brinely at player
spawn fully red brinely at player
spawn red brinely at player

However using %color%-%color% works fine.

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I can't specify colors of tropical fishes like red tropical fish and red-white tropical fish, it just says can't understand effect. But its syntax is correct: [(%-color%[-%-color%]|2¦fully %-color%)] tropical fish(|1¦es)