fix: detect empty Rich Text fields using `@prismicio/helpers`'s `isFilled.richText()`

[angeloashmore]

Types of changes

• [ ] Chore (a non-breaking change which is related to package maintenance)
• [x] Bug fix (a non-breaking change which fixes an issue)
• [ ] New feature (a non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Description

This PR correctly handles all types of empty Rich Text fields when using <PrismicRichText> and <PrismicText>. It uses @prismicio/helpers's isFilled.richText() helper internally.

This PR was done specifically to fix an unhandled case where a Rich Text field could contain a single empty paragraph block. This is treated as empty when using isFilled.richText(), but it was not handled properly in @prismicio/react before this PR.

Checklist:

• [ ] My change requires an update to the official documentation.
• [x] All TSDoc comments are up-to-date and new ones have been added where necessary.
• [x] All new and existing tests are passing.

🐕‍🦺

[github-actions[bot]]

size-limit report 📦

Path	Size
dist/index.js	4.38 KB (+6.74% 🔺)
dist/index.cjs	6.27 KB (+0.46% 🔺)