preserve line breaks during markdown deserialization

[natamox]

Checklist

• [x] yarn typecheck
• [x] yarn lint:fix
• [x] yarn test
• [x] yarn brl
• [x] yarn changeset
• [x] ui changelog

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🦋 Changeset detected

Latest commit: 564769a5809856c79782b351855d7e85b4369e5d

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

This PR includes changesets to release 3 packages

Name	Type
@udecode/plate-markdown	Patch
@udecode/plate-ai	Patch
@udecode/plate	Patch

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Name	Status	Preview	Comments	Updated (UTC)
plate	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 18, 2024 4:42pm

[zbeyens]

@natamox Looks great! Could you just add a changeset for the release?