Add record hover callback

Is your feature request related to a problem? Please describe.

I would like to be able to perform an action when a row is hovered.

Describe the solution you'd like

Maybe a new prop, onRecordHover, with the signature:

type OnRecordHover<T> = (record: T | null, index: number) => void;

Where, record is null, if the mouse moved outside the table body.

Describe alternatives you've considered

Here's my current hacky workaround:

const handleMouseOver = useCallback(
    ((e: React.MouseEvent<HTMLTableElement>): void => {
      const tr: (HTMLElement | null) = (e.target as Element).closest('tr');

      if(T.isNullish(tr) || !tr.classList.contains('mantine-datatable-row')) {
        props.onRecordHover(null);

        return;
      }

      const index: number = Array.from(tr.parentNode!.children).indexOf(tr);

      props.onRecordHover(records[index]!);
    }),
    [props.onRecordHover, records]
);

No files or tests are named in the issue. Start by locating the table body and row-rendering entry points, then trace how row mouse events are handled. Done means exposing the requested callback with the stated signature, including null when the pointer leaves the table body, and covering that behavior with tests.