Support language loading at runtime

[PPakalns]

A lot of languages have hyphenation definitions under non permissive license. Therefore they are not included in hyper.

Support hyphenation loading at runtime! This would allow typst to better support more languages for which permissive license hyphenation files are not available and can not be included in hypher.

[laurmaedje]

It's a fair request and I'm open to it. Would take some work though to make this possible, which I currently don't have. If you're interesting in taking it on, I would be happy to help if there are any questions.

[PPakalns]

For now we are evaluating typst and other tools (latex variants) for replacing Word files for competitive programming task statement preparation. This was one missing feature that I found, but is not a major problem.

In future if we will start using typst tool, I will return to this issue.

This is a very good library, typst is a great tool, thanks for developing it.