[FEAT] Add option to skip formatting the Frontmatter

[cstrlcs]

Changes

I know this is a very specific use case, but I thought: Why not? Maybe someone else will find useful.

• Adds a new option called "astroSkipFrontmatter" that preserves the content of the front matter. Useful for when the developer wants to format only the template.
• This is useful for integrating with other tools like Biome (https://biomejs.dev) that can format and lint Astro's frontmatter but not the template/html (yet).

My use case: I added a new script to my package.json that can format all my astro components without interfering with BIome's onSave lint/format.

Testing

• Added fixtures for the new option
• Did not add tests for it, since all the other tests for previous options were commented out.

Docs

• Added new section on README.md describing the option.

Thanks!

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🦋 Changeset detected

Latest commit: 63e11a5

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
prettier-plugin-astro	Minor

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[Princesseuh]

Hmm, I'm not sure why the other tests for options specific to Astro were commented out. I feel like they should work. That's something to look at for another PR though, this looks great to me.

[cstrlcs]

Hi! I forgot to run format before committing. Just pushed a fix adding the commas and semis the bot was complaining. Please, let me know if there is something I can change to improve this PR.

Thanks!!

[Princesseuh]

Looks awesome, thank you for contributing this!

[tinchoz49]

Hi @cstrlcs, thanks for doing this. Question: doest it work also for <script> tags?