docs: add play link for ChunkEntries example in README

[oswaldom-code]

Added a Go Playground link for the ChunkEntries example in the README.
This allows users to quickly run and test the example without setting up a local Go environment.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.29%. Comparing base (3ce2b6f) to head (2ac9336).
Report is 7 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #600   +/-   ##
=======================================
  Coverage   94.29%   94.29%           
=======================================
  Files          18       18           
  Lines        3192     3192           
=======================================
  Hits         3010     3010           
  Misses        170      170           
  Partials       12       12           

Flag	Coverage Δ
unittests	94.29% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.