feat: POC - virtual tree with full scrolling #1609
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Tree virtual scrolling POC.
Done to test performance of a possible migration to automatically flattened tree.
This POC helps prove that there is no improvement in performance if we want to keep the current declarative API.
The POC has many visual glitches, but they are irrelevant as long as the basic performance goals are not met.
Proceeding with fully virtualized tree is only feasible in a new component with a new model-driven API.
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What kind of change does this PR introduce?
What is the current behavior?
Issue Number: CDE-2320
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