Add UUID sugar like Workflow::uuid()

[roxblnfk]

Add UUID sugar like Workflow::uuid() or Workflow::uuid4(), ::uuid7(), ::uuid8()

It may look like:

# Workflow context

$uuid = yield Workflow::uuid7();

[roxblnfk]

@Sushisource what do you think witch option is better?

1. Only one uuid method

   $uuid = yield Workflow::uuid(); // Generate UUIDv4 or UUIDv7

2. User may choose needed UUID version

   $uuid4 = yield Workflow::uuid4(); // Generate UUIDv4
   $uuid7 = yield Workflow::uuid7(); // Generate UUIDv7

We can add all the UUID versions but 4 and 7 are most popular