WEBDEV-7886 Add data source method to configure whether the end of results has been reached

[latonv]

Exposes a setEndOfDataReached method on the data source that can update its state accordingly, causing further page fetches to return early.

[github-actions]

PR Preview Action v1.6.2
Preview removed because the pull request was closed.
2025-10-28 00:34 UTC

[codecov]

Codecov Report

❌ Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.73%. Comparing base (e57a65b) to head (18a18b4).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/data-source/collection-browser-data-source.ts	71.42%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #504      +/-   ##
==========================================
- Coverage   92.73%   92.73%   -0.01%     
==========================================
  Files         112      112              
  Lines       18814    18821       +7     
  Branches     1473     1473              
==========================================
+ Hits        17448    17453       +5     
- Misses       1295     1297       +2     
  Partials       71       71              

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