Invalid use of "ari:" text prefix for binary form of values

[BrianSipos]

The current ANMS "build" page uses the text form of "ari:0x..." but this is not actually one of the valid contents for URI-form of these values, will not be usable with other tools, and is generally confusing. The human-facing binary form for ARIs should just be hex-encoded CBOR ("0x..."), use the name "cborhex" where needed, and not use the prefix text "ari:".