Don't auto compile Typst file if output file will be empty

[Andrew15-5]

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Feature Request

Similar to #11, I have a problem when I edit a library/package file which only has defined functions, and automatically I have a useless empty PDF file. I have to remove it all the time or disable LSP plugin and then re-enable it.
I would like to be able to freely edit whatever Typst file I want, but compiled files shall only appear for files that actually typeset something.

For example, if there are only defined variables and functions, then there shouldn't be anything generated. If another Typst file is imported, then the PDF of the main file should only appear if in the imported file something is being typeset. So, if an imported file is a template (like a preamble in LaTeX) or a library, then they and the main file shouldn't be compiled.

[kescobo]

I'm having the same problem. An different / probably easier to implement solution might be to have a allow list and or deny list (whitelist/blacklist) to enable selective compilation. Having this automatic detection of things would certainly be nice though.