feat: refresh data client-side on preview updates

[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)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

This PR allows a page to refresh its preview content without reloading the whole page. This happens when a document is edited + saved while a preview session is open.

When a document is published, the page will continue to perform a full refresh as it did before this PR. A full refresh is currently the only way to hide/reset the Prismic toolbar.

The changes in this PR should result in slightly quicker preview updates and a less jarring preview experience.

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.

🪸

[codecov-commenter]

Codecov Report

Merging #29 (b37ab54) into main (9527e85) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #29   +/-   ##
=======================================
  Coverage   99.84%   99.85%           
=======================================
  Files          11       11           
  Lines         661      668    +7     
  Branches       31       31           
=======================================
+ Hits          660      667    +7     
  Partials        1        1           

Impacted Files	Coverage Δ
src/PrismicPreview.tsx	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9527e85...b37ab54. Read the comment docs.

[github-actions]

size-limit report 📦

Path	Size
./dist/index.cjs	5.93 KB (+0.27% 🔺)
./dist/index.js	2.76 KB (+0.57% 🔺)

[angeloashmore]

This functionality has been built into PR #63.