Added support for generating UUID version 8 for a specific time

[SidorkinAlex]

``Added support for generating UUID version 8 for a specific time, as well as for retrieving the first and last UUID version 8 for a given time interval. This enhancement allows the use of UUID filtering instead of time filtering, which can, in some cases, eliminate the need for additional indexes in the data structure and even the need for extra columns in additional tables.

$firstDate = \DateTime::createFromFormat('Y-m-d H:i:s.u', '2024-01-01 13:12:12.129817');
$uuid8_from_date = UUID::uuid8($firstDate);
$uuid8_zero_value = UUID::firstUuid8($firstDate) // 018cc527-3c61-8d12-9000-000000000000 first uuid from this time
$uuid8_last_value = UUID::lastUuid8($firstDate) //  018cc527-3c61-8d12-9fff-ffffffffffff last uuid from this time
var_dump(($uuid8_zero_value < $uuid8_from_date) && ($uuid8_from_date < $uuid8_last_value)); // bool(true)
```