Is your feature request related to a problem? Please describe.
The GenerateUUID operation could support other UUID formats than v4 only. Specifically addition of v5 with two input fields: namespace and name would be helpful.

Describe the solution you'd like

Add a version selector to the GenerateUUID operation to select either v4 or v5.
When v5 is selected 2 new input fields are revealed to enter "namespace" and "name" as required by the spec.
After filling out those fields, the UUIDv5 is generated.