Add prettier and format files

[lorenzolewis]

What kind of changes does this PR include?

• Changes to Starlight code

Description

• Add prettier and prettier-plugin-astro
• Add prettier config (based on the main Astro repo)
• Format all files in repo

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Latest commit: b0224d7

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[HiDeoo]

The plugin autoloading feature from Prettier was removed in v3 and the Prettier configuration file does not explicitly specify the Prettier plugin for Astro so I don't think it's running on Astro files (which may be why the diff does not contain any Astro file changes).

Altho, I do not think specifying the plugin in the config would be enough as there is currently a bug in Prettier where you have to manually specify the files handled by a plugin for it to format these files, e.g. prettier --write **/*.astro.

I wonder if it would not be wise to wait until this issue is fixed before introducing Prettier to the codebase?

[lorenzolewis]

Thanks @HiDeoo , didn't even think to double-check the Astro files.

I updated the prettier config to include the plugin and added a format script that will at least catch it all (from what I can tell). Also got all those *.astro files formatted.

Completely understand if you want to hold off on this until prettier/prettier#15079 / withastro/prettier-plugin-astro#334 (comment) are resolved.

[delucis]

Thanks for this @lorenzolewis! Left a few observations. And… of course this is now conflicting 😅 Hopefully easy enough to resolve by reverting the formatting, updating branch, and then re-formatting?

[delucis]

Looking at the code samples now they’re using tabs, we should probably set tab-size for Starlight code blocks.

We can do it in a follow-up PR though so we’re not mixing formatting with meaningful code changes.

[lorenzolewis]

I found another magical button on GitHub that apparently closed this one 😅 I'll re-open another one with the suggestions included.