Create palletes sample for the cell selection topic.

Create samples with custom palletes for the cell-selectiontopic. Refer to cell selection samples in this repo and create samples. The samples should look like the ones in this PRs:
Grid: https://github.com/IgniteUI/igniteui-react-examples/pull/929
Hgrid and Tgrid: https://github.com/IgniteUI/igniteui-react-examples/pull/927