feat: provide a fallback string to `<PrismicText>`

[angeloashmore]

Types of changes

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

Description

This PR adds the ability to provide a fallback string to <PrismicText>. If the provided Rich Text or Title field is nullish, the fallback string is rendered. If a fallback string is not given, null is rendered (this is the existing functionality).

Example:

<PrismicText field={null} fallback="Untitled" />
// => <>Untitled</>

<PrismicText field={undefined} fallback="Untitled" />
// => <>Untitled</>

Closes #105

Checklist:

• [x] 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.

🕊️

[codecov-commenter]

Codecov Report

Merging #126 (9e9a324) into master (ce32036) will increase coverage by 0.36%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #126      +/-   ##
==========================================
+ Coverage   92.25%   92.61%   +0.36%     
==========================================
  Files          16       16              
  Lines         271      271              
  Branches       60       61       +1     
==========================================
+ Hits          250      251       +1     
  Misses          5        5              
+ Partials       16       15       -1     

Impacted Files	Coverage Δ
src/PrismicText.tsx	100.00% <100.00%> (ø)
src/usePrismicClient.ts	100.00% <0.00%> (+12.50%)	:arrow_up:

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[github-actions[bot]]

size-limit report 📦

Path	Size
dist/index.js	4.11 KB (+0.41% 🔺)
dist/index.cjs	6.24 KB (+0.33% 🔺)