chore: fix style type on BreakRenderer

[neilsong]

📝 Description

Casts ViewStyle prop to StyleProp in break.tsx renderer.

📌 Related Issue (Optional)

Closes #56

📷 Screenshots (Optional)

📄 Test Markdown File (Optional)

✅ Checklist

• My PR title follows the Conventional Commit format (e.g. feat:, fix:, chore:)
• This PR addresses the related issue (if applicable)
• I have attached a sample Markdown file (.md) used for testing
• I have attached at least one screenshot of the rendered output (light and/or dark mode preferred)
• I have run pnpm run lint:fix to fix formatting and lint errors
• I have tested the changes in the example app (pnpm i && cd example && pnpm i && pnpm run ios)

[neilsong]

@imwithye Consider compiling the library with exports for common utility functions and defaults like mergeStyles and defaultRenderers for more advanced customization.

#56 surfaces when consumers of the package import source files for these definitions, leading to type compilation (and errors) to occur downstream