feat(combobox): Add new grouped variant (#3050)

* feat(combobox): Add grouped combobox variant

* Feature parity

* Revert changed files that shouldnt have changed

* Fix regressions and cleaned up jsx files

* Add new TOC

* Cleanup, add documentation, update snapshots

* docs(combobox): Base combobox docs first pass

* docs(combobox) autocomplete docs first pass

* Autocomplete and lookup docs and fixes to listbox focused options

* Start Grouped Combobox by adding aria-controls and updateing the entity switcher label

* Wrap docblock examples in <Example />, apply unique IDs to all combobox and listbox

* Add tests for combobox

* Update snapshots

* Update IDs on grouped example

* Update snapshots

* Update snapshots

* Update snapshots

* Fix VNU

* Update snapshots

* Update snapshots and documentation

Author: brandonferrua