feat(core): use gray-matter to stringify dependencies frontmatter

[craig0990]

Motivation

Use gray-matter to generate dependencies frontmatter, as per discussion in #1081

Fixes #1081

• Not sure how you feel about the [].join() for the markdown 🥲 (Never know how to format multi-lines where indentation affects output)
• Not sure how you feel about the changeset wording

[changeset-bot]

🦋 Changeset detected

Latest commit: 23d2ebf

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

This PR includes changesets to release 1 package

Name	Type
@eventcatalog/core	Patch

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[craig0990]

Well that's embarassing. Updated to:

• Rebase for pnpm
• Import commonjs style instead of named imports
• Format with prettier
• Run pnpm run verify-build:catalog locally to check ✅
• Seems the docker test has changed?

[boyney123]

Thank you @craig0990 , this looks good to me, sorry it's taken awhile to review, I have been head down on presentation stuff for a couple of weeks. Let's get this in!

[boyney123]

@all-contributors add @craig0990 for code

[allcontributors]

@boyney123

I've put up a pull request to add @craig0990! 🎉