Thank you for this cool package.

I have a feature request:
The latex glossaries package has the commands \Gls and \Glspl that capitalize the first letter, which is very useful if an entry is used at the beginning of a sentence. Would it be possible to add corresponding functions in glossarium?

I tried to write a function that calls gls() and modifies the first letter, but couldn't figure out how to access the string in the returned content object. AFAIK, Typst doesn't offer a built-in function like upper() that only capitalizes the first letter.