fix: type issue where barrel exported functions could not be imported without a type error

[kylemcd]

Importing certain functions, for example stateExtensions, would result in a type error:

This issue seemed to effect any export from ./src/index.ts that was barrel exported. This PR updates any barrel exported values within ./src/index.ts to be named exports instead.

This fixes the type issue:

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🦋 Changeset detected

Latest commit: 8ef8325613d5c2e666377d216749fe8e2115b3fb

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

This PR includes changesets to release 1 package

Name	Type
codemirror-json-schema	Patch

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[kylemcd]

@acao Could I get a review on this when you get a chance? Should be an easy merge.