Feature Request: Dynamic Row Heights and Shared Virtualization Utilities

Feature Request: Dynamic Row Heights and Shared Virtualization Utilities: a task in LegoFlow-SWE (Harbor dataset). Observed behavior VirtualScroll and FlexTable currently only accept a fixed rowHeight number. All rows are forced to the same height, and scrollToIndex becomes unreliable if the rows…

The task

**Observed behavior** `VirtualScroll` and `FlexTable` currently only accept a fixed `rowHeight` number. All rows are forced to the same height, and `scrollToIndex` becomes unreliable if the rows actually have varying heights. The virtualization logic is also tightly coupled to the list layout, making it impossible to…

Part of Lego-X/LegoFlow-SWE.