Native tree data: built-in expand/collapse for hierarchical rows

[bmarkov]

Tree-shaped data already works in SvGrid, but you have to wire the expand/collapse state yourself - there's a guide and the org-chart demo for it. It works, it's just more setup than it should be.

I'd like to make it first-class: point the grid at your hierarchy and get expand/collapse, indentation, and keyboard nav for free - and, importantly, load children lazily so a deep tree doesn't mean pulling everything up front.

Putting it on the roadmap: https://svgrid.com/roadmap

If you work with hierarchical data - org charts, BOMs, file trees, nested categories - I'd love to know how deep your trees get and whether lazy loading is a must-have.