fix(helpers): add missing dir attribute for right-to-left languages

[lihbr]

Resolves: https://prismic-team.slack.com/archives/C014VAACCQL/p1729780207755199

Description

This PR updates the default richtext serializer to honor the direction property of rich text nodes and adds the appropriate dir attribute on right-to-left text nodes. undefined should serialize to "no attribute" in React according to the types.

P.S. Are we considering releasing a major of this kit to eliminate the dependency on @prismicio/types/@prismicio/richtext? It's not that much of a big deal for now but might cause more issues later on.

Related:

• @prismicio/client PR: fix(helpers): add missing dir attribute for right-to-left languages prismic-client#357
• @prismicio/svelte PR: fix(helpers): add missing dir attribute for right-to-left languages prismic-svelte#24

Checklist

• If my changes require tests, I added them.
• If my changes affect backward compatibility, it has been discussed.
• If my changes require an update to the CONTRIBUTING.md guide, I updated it.

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[github-actions]

size-limit report 📦

Path	Size
./dist/index.cjs	8.19 KB (+0.48% 🔺)
./dist/index.js	6.13 KB (+0.78% 🔺)
./dist/react-server.cjs	7.39 KB (+0.5% 🔺)
./dist/react-server.js	5.64 KB (+0.67% 🔺)

[angeloashmore]

@lihbr: P.S. Are we considering releasing a major of this kit to eliminate the dependency on @prismicio/types/@prismicio/richtext? It's not that much of a big deal for now but might cause more issues later on.

Yes, we will want to move to pure @prismicio/client eventually. As it is not necessary right now, I'd prefer holding off from making a breaking change.

[angeloashmore]

Looks good!