useDragHooks/useDropHooks docs (#3012)
* initial content for react-spectrum useDragHooks
* adding drop target and adding more copy
* adding after version
* updating example
* adding types and updating docs
* updating type descriptions per review
* adding example blurb
* making it a bit more readable
* fixing grammer
* addressing some review comments
* small reorg
* simplifying drag and drop example
* some outlining
* updating accessbility section
* first draft of concepts section
* typo
* proof reading
* adding sections for api props
* addressing review comments
* review comments
* forgot one update
* renaming file
* fix link
* addressing review comments
* fix plural copy
* addressing review comments
* Fixing typo
Co-authored-by: Reid Barber <reid@reidbarber.com>
Co-authored-by: Reid Barber <reid@reidbarber.com>
