Currently `Brush` does not work when using a path-based `TooltipContext` mode, such as `band` and `voronoi` due to pointer event propagation ([code](https://github.com/techniq/layerchart/blob/main/packages/layerchart/src/lib/components/tooltip/TooltipContext.svelte#L419-L467)). Other modes (`bisect-x`, `quadtree`, etc) work since they use events from the [parent](https://github.com/techniq/layerchart/blob/main/packages/layerchart/src/lib/components/tooltip/TooltipContext.svelte#L390-L407) and not a sibling element.
