Feat: Make aliases autocomplete

[ninjaguardian]

When Skytils.config.commandAliasesSpaces = true, the code is mostly similar to the old code.

The code basically just takes all the aliases and makes them a command that runs code to send the actual target command.

One question: do I have to include the preprocessor stuff for 1.8.9? If so, I can't really test it because a bunch of other code doesn't compile for 1.8.9-fabric when I build.

[ninjaguardian]

/gemini review

[ninjaguardian]

Also, why didn't the checks run?

[Sychic]

[ninjaguardian]

Should this be merged? It has a positive review.