Forward table entity generic

[dereuromark]

Summary

This forwards Cake's new table entity generic through Tools' base table class.

• add TEntity to Tools\Model\Table\Table
• forward it to Shim\Model\Table\Table<TBehaviors, TEntity>
• temporarily point CI at the stacked Shim and core branches until those land

Notes

This draft is intentionally stacked on:

• 5.x: Add table entity generics cakephp/cakephp#19388
• dereuromark/cakephp-shim (draft PR from copilot/table-entity-generics)

It should not be merged before the core PR and Shim PR. Once those land, this branch can be rebased to remove the temporary branch-based dependencies.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.02%. Comparing base (2d920fd) to head (46eb925).
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Additional details and impacted files

@@             Coverage Diff              @@
##             master     #319      +/-   ##
============================================
- Coverage     80.09%   80.02%   -0.07%     
  Complexity     2128     2128              
============================================
  Files            85       85              
  Lines          5897     5897              
============================================
- Hits           4723     4719       -4     
- Misses         1174     1178       +4     

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