Automatically centre `dots` between infix notation

Description

Coming from Overleaf and TeX-style math, I am use to the compiler autommatically handling triples dots between different symbols.

For example, 1 + \dots + n will centre the dots like this: $1 + \dots + n$.
But keep the dots lowered for lists 1, \dots, n like this: $1,\dots, n$.

Use Case

Here is a Typst generated document.

And here is Overleaf's generated document.

Although it can be easy enough for a human to add a ".c" when needed, this change would make it easier for machine generated documents (e.g. Quarto, Pandoc) to maintain a similar appearence between formats, and more consistant for users coming from TeX-style math.

Start by locating the repository code that parses or renders infix notation and any tests covering dots or ellipses. Compare the existing output for 1 + \dots + n and 1, \dots, n with the expected centered and lowered forms; done means both cases produce the requested placement without changing list behavior.