Add support of prettier-plugin-astro

[iamkhan21]

Please, add prettier-plugin-astro

[dsherret]

It should be working in the latest release. I didn't test it though 😅

https://github.com/dprint/dprint-plugin-prettier/releases

[dsherret]

I had to temporarily disable this because astro started shipping a wasm file and I need to spend a bit of time updating it. Ideally the upgrade will happen as part of the new plugin system (#55)

[g-plane]

If you want to format Astro files with dprint, try: https://github.com/g-plane/markup_fmt