v0.42.0 - Implement sticky footer, footer actions and header margin for the tablestabelas

• add stickyFooter prop to <DataTable> and <TableInteractive>, pinning the pagination to the bottom of the scroll container while the rows scroll under it; like stickyHeader, it needs maxHeight to scroll within and flips the table to border-collapse: separate, so the stuck footer paints its own white background and gray[200] shadow
• add footerActions prop to <TableInteractive> and <TablePagination>, rendering content in the pagination footer opposite the page controls; without it the pagination slotProps pass through untouched
• add headerMargin prop to <TableInteractive>, replacing the 0 0 8px 0 margin of the header row that carries headerActions and the preferences button; a number is read as px
• make size='small' also reach the <TableInteractive> preferences icon (20px) and the <Table> sort icon (14px)
• center the <TableInteractive> header row and square the preferences button padding to 4px
• fix the <ListItemDark> dense icon growing to 18px when a later-rendered variant of the item won the cascade; the slot now always sizes its icon, and the action icons keep 18px
• add IconFlagRounded to design system @mui icons