[split-layout] Provide way to get the current splitter position

[Frettman]

Describe your motivation

I'm currently migrating a Vaadin 7/8 application where I could register a SplitPositionChangeListener at a Horizontal/VerticalSplitPanel to remember and restore the latest splitter position set by the user.
The new vaadin-split-layout provides a splitter-dragend event, but that doesn't contain any additional information like the position.

Describe the solution you'd like

I would like a way to determine the current position of the splitter in avaadin-split-layout.

Describe alternatives you've considered

I'm not aware of any alternatives.

Additional context

No response

[web-padawan]

Thanks for the issue. Closing in favor of vaadin/flow-components#1517 which contains some possible workarounds.