Fix shorthand props not working inside expressions and update error handling

[Princesseuh]

Changes

This PR does two things:

• Fixed shorthands props not working in expression. This is a more complicated issue than it might seems because inside expressions, we use a TypeScript parser and as such, Astro-isms will cause a parsing error. I solve this by first transforming the expression into a JSX compatible one and then re-adding the Astro-ism once it's formatted
• Changed how error handling works when we can't parse an expression, now the plugin will report the error, but won't actually fail. Instead the node will be left as-is. This is consistant with how other Prettier plugins work (ex: the Svelte one does this, so does the official MDX one (I believe?)). If PRETTIER_DEBUG=1 is set, then the plugin will throw like before (just like official Prettier plugins does)

Both changes didn't need to be done in the same PR, however updating the error handling made it easier to implement the shorthand fix in a nice way

Fix #168
Fix #224

Testing

Added a test

Docs

N/A

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🦋 Changeset detected

Latest commit: 7ad992b

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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[antonyfaris]

LGTM!