fix: fallback to bundled Prettier when finding Prettier 2

[Princesseuh]

Changes

yaml-language-server uses Prettier 2.x to power its formatting, this confuse our formatting because we expect Prettier 3. Really, they shouldn't be using Prettier in the first place (see redhat-developer/yaml-language-server#933), but alas, they do. We don't use their formatting at all, but still this affects us.

This PR refactor the package loading to not try to load Prettier 2 when it's there, which should fix both this situation and also when people have dependencies using Prettier 2. Installing Prettier in your own repo also still works, as require.resolve will find it first before more nested versions.

Fix #946

Testing

Tests should still pass, and tested locally that it outputs the error message correctly

Docs

N/A

[changeset-bot]

🦋 Changeset detected

Latest commit: 424f908

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

This PR includes changesets to release 3 packages

Name	Type
@astrojs/language-server	Patch
@astrojs/check	Patch
astro-vscode	Patch

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[bluwy]

Looks great!