TableCell should support colSpan and rowSpan attributes

[LukasFritzeDev]

<Table> / <TableCell>

The <TableCell> component should support the nativ TH Attributes colspan and rowspan.

Current solution:

Use empty columns to fill up row:

    <Table>
      <TableHeader>
        <TableColumn>Titel</TableColumn>
        <TableColumn>Pfad</TableColumn>
        <TableColumn>Fehler</TableColumn>
        <TableColumn>Warnungen</TableColumn>
        <TableColumn>Score</TableColumn>
      </TableHeader>
      <TableBody>
        { ... }
        <TableFooterRow>
          <TableCell>
            <strong>Gesamtbewertung</strong>
          </TableCell>
          <TableCell></TableCell>
          <TableCell></TableCell>
          <TableCell></TableCell>
          <TableCell>
            <strong>{profile.issueSummary?.score}</strong>
          </TableCell>
        </TableFooterRow>
      </TableBody>
    </Table>