Add special color case handling for older titles

[CodyNinja1]

This PR adds a new option for Parser.toHTML/parse called allowShortColors: boolean, that controls short-color behaviour to allow compatibility between older titles and this library, alongside a new testcase for said option called should handle incomplete color codes by cutting text off.

Below is an example of it:

import Parser from './Parser.js';

// retains current behaviour, color is padded with zeros
// "$fhello, world" == "$f00hello, world"
Parser.toHTML("$fhello, world", { allowShortColors: false });

// non-hex characters are replaced with zeros, and 2 chars are "eaten" from the string.
// the tag "$fhe" is treated as a color, and is equivilant to "$f0e"
// "$fhello, world" == "$f0ello, world"
Parser.toHTML("$fhello, world", { allowShortColors: true });

[codecat]

Thanks for the PR! Damn, I really typo'd DefaultOptions everywhere huh..

I haven't looked at the actual implementation yet (I suspect there might be a better way?) but here's some preliminary notes.

[codecat]

We should aim to have descriptions like these as part of the DefaultOptions file instead.

[codecat]

Missing ;

[codecat]

I also think the name of the setting is misleading and doesn't really explain its intention. I have a better idea for the long run, but we should probably rename this to something like consumeNonHexColors? (Maybe there's something shorter that's still concise)

[CodyNinja1]

Is interpretNonHexAsColor a good name?
Also, should I move the comment to DefaultOptions.js or not right now?

[codecat]

That name works. Yeah, you can add the documentation for that option in DefaultOptions. I can fix the formatting and add more documentation later 👍

[CodyNinja1]

Should be good to go now.