Customising more aspects of Markdown tables

[EdricChan03]

Seems TableStyle only supports specifying the cell padding - it would be great for table headers to be styled too, perhaps with a modifier or a background colour

data class TableStyle(
  val cellPadding: PaddingValues,
  val headerRowStyle: TableRowStyle,
  val rowStyle: TableRowStyle, // perhaps?
)

data class TableRowStyle(
  val cellStyle: TableCellStyle
)

data class TableCellStyle(
  val backgroundColor: Color,
  val textColor: Color
)

@Composable
fun m3TableCellStyle() = TableCellStyle(
  MaterialTheme.colorScheme.surfaceContainer,
  MaterialTheme.colorScheme.onSurface
)