* Add CBOR credential ID type
Update the format of the credential ID we generated to extend the
encrypted portion from only private_key + rp_id_hash to a flexible CBOR
map. This way we can persist more data into the key handle in the future
without need of a new version.
We add credProtectPolicy to the persisted data in this commit too, so we
can correctly check the credProtectPolicy for non-discoverable
credentials in follow-up commits.
* Fixed some style problems.
* Fix cargo clippy warning
* Check credProtectPolicy for non-discoverable credentials.
* Remove support of old v1, v2 key handles
- And changed some style problems
* Style changes
* Add missing `alloc` use
