Seed UR format handler. Round-trippable: seed UR → seed → seed UR. Uses the ur:seed format from bc-components.
Get the format name
Whether this format supports round-trip conversion
Process input and update CLI state with seed
Process seed from CLI state and return output string
Seed UR format handler. Round-trippable: seed UR → seed → seed UR. Uses the ur:seed format from bc-components.