Guide on font preloading about docs

[ayuhito]

Just a heads up that I made that workaround official with a guide in Fontsource: fontsource/fontsource#963 🎉

[Jothsa]

I'd like to see this added as well. I might be able to do it if that's ok

[aretrace]

Yes, I been looking for this. It would be extremely useful in the docs.

[sarah11918]

Hi there! This seems like a helpful addition, and if the workaround exists in Fontsource docs now then perhaps linking to it rather than reproducing it here makes sense from a maintenance perspective.

I would be happy to receive a PR to add this extra helpful content to the docs! We don't "assign" issues to people in this repo, but are happy if you'd like to use this thread to coordinate or express intention to follow through.

So I will add help wanted to this issue to indicate that anyone is free to contribute! Thank you for raising it!