* Create tree-control component
* Remove items from treeItemProps
* Add tree-control expand/collapse on click the expander button or by a custom logic
* Add stories
* Add the type definitions
* Add use selection hook
* Upgrade WP components dependency to v19.8.5 to support indeterminate checkbox control
* Add selection logic to the tree control
* Create stories
* Add changelog file
* Fix linter error
* Add styles to fit the disign
* Highlight selected item when it's a single selection tree
* Rebasing from trunk
* Add comment suggestions
* Fix unit test errors due to a new version of @wordpress/compose related to the ResizeObserve feat
In order to ease the identification of private packages within the monorepo, this adds an `internal-` prefix to all of the current private packages. This makes it immediately clear when reviewing `packages/js` what is and isn't a private package.