Organize reusable components related to DataGridPro

[mddilley]

As we've made progress in implementing DataGridPro as a table replacement for Material Table, not having great organization for UI components has been a pain point for creating and collecting reusable components. After we migrate, we should make another pass at abstracting components with the goal of having a better folder structure for developers to be able to easily identify DataGridPro-related components in the future.

[mddilley]

@mateoclarke @roseeichelmann Thanks for sharing about this today! Please add anything related and edit my description if needed. 🙏 cc @chiaberry