feat: POC - virtual tree with full scrolling

[Jinnie]

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.

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• If applicable, have a visual design approval

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

Issue Number: CDE-2320

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information