Add tectonic (XeLaTeX) command

[ajalexei]

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It might be worth adding tectonic XeLaTeX distribution along with the already available TeX, LaTeX commands/distributions. In my opionion it has several advantages over the more traditional TeX distributions:

• relatively small, more or less just the executable -- the required latex packages are downoloaded on demand. I wonder though whether this might be in violation of the iOS guidelines/rules?
• also replaces latexmk and others, e.g. handles the multiple passes of latex (bibtex, biblatex)

[holzschu]

Thanks for the suggestion. I had a look at tectonic. It seems to be written in Rust. I have not managed yet to cross-compile and run anything written in Rust on iOS.

[Emasoft]

I have not managed yet to cross-compile and run anything written in Rust on iOS.

This is the worst news ever... 😭 Being able to include Rust compiled binaries is vital for a-Shell. Libraries like OpenAI Tiktoken are wrappers around Rust code, and now everything, even stupid scripts, are using GPT API to become smarter and Tiktoken is quickly becoming a key requisite even to know what time is it. 😩