* Add new Discover main page Signed-off-by: vagimeli <[email protected]> * New Discover subpage and new content for multi data sources Signed-off-by: vagimeli <[email protected]> * Address tech and doc review comments Signed-off-by: vagimeli <[email protected]> * Copy edit line 129 Signed-off-by: vagimeli <[email protected]> * Address editorial review feedback Signed-off-by: vagimeli <[email protected]> * Final edits before merge Signed-off-by: vagimeli <[email protected]> Signed-off-by: vagimeli <[email protected]>