Add API docs (at least for DataGrid) #552
Description
As far as I can see there is no API documentation for ipydatagrid, and in particular no easy web-accessible way to discover the available options for DataGrid.
Astropy is incorporating ipydatagrid as the default way of providing a rich display of a table (astropy/astropy#17165), with a pass-through kwargs to allow customization of the DataGrid object. It would be very nice to help our users with a link to documentation on the available keyword arguments.