[On Hold] Implement CoseMac0

[justAnIdentity]

• [cose] Implement structural definitions for CoseMac0.
• [cose] Implement Mac generation algorithm.
• [cose] Implement Mac verification algorithm.
• [isomdoc] Add support for CoseMac0 to mdoc and reader authentication

[radumarias]

Initial implementation spruceid/cose-rs#16

[radumarias]

continue working on:

• [isomdoc] Add support for CoseMac0 to mdoc and reader authentication

For this I'm thinking to create a trait Cose that have some common methods between Cose_Mac0 and Cose_Sign1 that uses Signer and Verifier from the new common module and have smth like

Document<C: Cose> {
  pub issuer_auth: C,

and maybe default it to Cose_Sign1

2. similar in PreparedDocument, DeviceAuth, IssuerSigned, Mdoc, PreparedMdoc

3. Also we could use structs from common module https://github.com/spruceid/cose-rs/blob/feat/Implement_CoseMac0_66/src/common.rs in Cose_Sign1 also

This would give us a generic use of Cose objects and ability to maybe implement encryption also in the future

@sbihel @cobward @wyc please let me know what you think, how would be best to integrate it?

[radumarias]

if we integrate coset this will become obsolete #86