fix: improve binding validation

[liamdebeasi]

Description

The invalid binding detection misses code that is valid JS but is not a valid binding such as export default foo. This PR improves the detection by checking if the code can be used as a binding when passed into babel.

I'm also using the parseCode util now because it has presets that are needed to parse JSX/TSX.

Make sure to follow the PR preparation steps in CONTRIBUTING.md before submitting your PR:

• format the codebase: from the root, run yarn fmt:prettier.
• update all snapshots (in core & CLI): from the root, run yarn test:update
• add Changeset entry: from the root, run yarn g:changeset and follow the CLI instructions. Alternatively, use the Changeset Github Bot to create the file.

[changeset-bot]

🦋 Changeset detected

Latest commit: 520005a

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

This PR includes changesets to release 2 packages

Name	Type
@builder.io/mitosis	Patch
@builder.io/mitosis-cli	Patch

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 520005a.

Command	Status	Duration	Result
nx e2e @builder.io/e2e-app	✅ Succeeded	2m 5s	View ↗
nx run-many --target test	✅ Succeeded	5m 7s	View ↗
nx run-many --target build --exclude @builder.i...	✅ Succeeded	3m 43s	View ↗
nx build @builder.io/mitosis-site	✅ Succeeded	2m 21s	View ↗

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☁️ Nx Cloud last updated this comment at 2025-06-27 16:22:32 UTC

[liamdebeasi]

overall looks good! a few small comments. you'll need to get an approval from someone other than me since I'm the PR author