[Qt] Tree Widget#4112

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corranwebster wants to merge 13 commits intobeeware:mainfrom

corranwebster:qt-tree

Commits on Jan 21, 2026

[WIP] Tree working, building test probe but not complete.
corranwebster
committed

Commits on Jan 28, 2026

Add a cache that should prevent premature node garbage collection.
corranwebster
committed