Addressing collisions in CBOR map keys at arbitrary depth

[OR13]

As discussed in: https://github.com/ietf-wg-spice/draft-ietf-spice-sd-cwt/pull/18#discussion_r1798617534

Related references:

• https://www.rfc-editor.org/rfc/rfc9277.html#appendix-B
• https://datatracker.ietf.org/doc/html/rfc8392#section-3
• https://datatracker.ietf.org/doc/html/rfc8392#section-9.1.1
• https://datatracker.ietf.org/doc/html/rfc8392#section-1.1

[henkbirkholz]

To tag or not to tag the keys.