Implement Server Side Sorting

[blizzz]

Contributes to #941

For Views we can have filters and sorting, as well as dynamically in the web interface. In order to be able to return paginated results, we have to be able to also sort on server side. While filtering is implemented there, sorting is still an open todo. Cf.

tables/lib/Db/Row2Mapper.php

Lines 172 to 181 in be7ada5

	public function findAll(array $tableColumns, array $columns, int $tableId, ?int $limit = null, ?int $offset = null, ?array $filter = null, ?array $sort = null, ?string $userId = null): array {
	$this->setColumns($columns, $tableColumns);
	$columnIdsArray = array_map(fn (Column $column) => $column->getId(), $columns);
	$wantedRowIdsArray = $this->getWantedRowIds($userId, $tableId, $filter, $limit, $offset);
	// TODO add sorting
	return $this->getRows($wantedRowIdsArray, $columnIdsArray);
	}