feat(TreeData): add maxVisibleDepth option + runtime API

[ghiscoding]

closes #2373

vibe coded with copilot using GPT-5 mini

Adds a new treeDataOptions.maxVisibleDepth setting to limit how deep tree nodes are shown (nodes deeper than the value are hidden, not removed). Adds runtime API methods setMaxVisibleDepth(n) and clearMaxVisibleDepth() so apps can update or clear the limit at runtime. Updates demos and docs across frameworks and adds simple Set/Clear controls to the Example05/Example27 demos.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.0%. Comparing base (4b7dd59) to head (c845e5e).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2591   +/-   ##
=======================================
  Coverage   100.0%   100.0%           
=======================================
  Files         197      197           
  Lines       25355    25372   +17     
  Branches     8961     8967    +6     
=======================================
+ Hits        25355    25372   +17     

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

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commit: c845e5e

[ghiscoding]

@zewa666 this should address your feature request from issue #2373

at first it only added the tree data options and modified the Filter Service, but then it required more work for the end user to change it afterward. So I added 2 functions to set/clear the max depth via the Tree Data Service, which makes it much easier for the end user to change it at anytime.

Let me know if that covers it all, a big part of it was done by copilot

it's always a bit longer to review a PR now that we have all frameworks in here haha 😅 but it's good to have the same code change spread across all framework demos.... anyway if you could just review the 2 Services changes, that'd be great, thanks

...oh I forgot to test the export, which is a manual process, but I expect it to work since it's WYSIWYG but will check tomorrow nonetheless

EDIT

tested the export and it works as intended which isn't surprising since it's WYSIWYG