fix: <TodoSliceComponent /> compat with Slice Mapper

[lihbr]

Types of changes

• Chore (a non-breaking change which is related to package maintenance)
• 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

Mapped slices would cause the <TODOSliceComponent /> component to throw because of a different interface used by mapped slices (slice type being top level instead of nested under the slice property).

This standardizes the props given to <TODOSliceComponent /> so everything keeps working smoothly based on our Svelte implementation: https://github.com/prismicio/prismic-svelte/blob/master/src/SliceZone/SliceZone.svelte#L118-L128

I first explored adapting the <TODOSliceComponent /> to support different interfaces instead, but it resulted in messier code in my opinion: https://github.com/prismicio/prismic-vue/blob/95d5771b51dc45df5bd6663178afceae8942dc4c/src/components/SliceZone.ts#L263-L280 (hence the sister PR for Vue: prismicio/prismic-vue#70)

Checklist:

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

[github-actions]

size-limit report 📦

Path	Size
./dist/index.cjs	8.03 KB (+0.1% 🔺)
./dist/index.js	6.05 KB (+0.13% 🔺)
./dist/react-server.cjs	7.22 KB (+0.14% 🔺)
./dist/react-server.js	5.58 KB (+0.2% 🔺)

[angeloashmore]

Thanks, good catch! This version is simple to read.