fix: CORUI-6127: Refactor Tree component (#394)

* Refactor Tree

* Add html friendly generate func

* Fix lint

* Change shortid prefix

* Add prop descriptions

* Allow custom classname for tree header

* Toggle collapse aria labels

* Move row id to object property

* Rename Tree to TreeView

* Rename files to TreeView

* Rename TreeHead

* Rename TreeList to Tree

* Rename TreeCell to TreeCol

* Factor out TreeItem component

* Add simple tree view to docs

* Fix row props

* Implement TreeBranch component

* Allow expand state override

* Add children prop descriptions

* Back tick the component names in docs

* Use internal Tree component

* Use displayName for component checks

* Expose expand callbacks

* Update prop desc

* Fix missed change from merge from master

* Minor updates after merge from master

Author: cjskillingstad