fix(common): keep Tree Data synchronized after deletions

[ghiscoding]

Updates GridService so Tree Data hierarchy synchronization runs after single and bulk deletions, while avoiding repeated rebuilds during bulk operations. Adds regression coverage for all deletion paths and corrects the hierarchical Tree Data documentation examples across Vanilla, Angular, React, Vue, and Aurelia.

Tests: 118 GridService tests passed; Prettier checks passed.

LLM model: GPT-5 (Codex)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.0%. Comparing base (5136cb5) to head (5e67331).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #2733     +/-   ##
=========================================
+ Coverage   100.0%   100.0%   +0.1%     
=========================================
  Files         200      200             
  Lines       25550    25559      +9     
  Branches     9034     9037      +3     
=========================================
+ Hits        25549    25559     +10     
+ Misses          1        0      -1     

Flag	Coverage Δ
angular	100.0% <ø> (ø)
universal	100.0% <100.0%> (+0.1%)	⬆️

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commit: 5e67331