feat!: COSE_SIGN1 signatures and verification

[dtscalac]

Description

Adds catalyst_cose, a package that exposes a CBOR Object Signing and Encryption RFC-9052, RFC-9053 implementation.

This package supports only a subset of COSE features and algorithms.

Supported features:

• COSE_SIGN_1: signature + verification

Supported algorithms:

• EdDSA: Ed25519

Description of changes

The PR removes support for federated plugin structure, instead of relying on 3rd party packages to implement it per platform we have created our own pure dart implementation that works on every target (web, mobile, desktop).

Naturally we won't have support for as many algorithms as these 3rd parties could provide but thanks to this approach we don't need some huge/complicated node.js dependencies for web and native ones for Android/ios. Adding more algorithms should be straightforward enough.

Related Issue(s)

Closes #639

Screenshots

Sample generated COSE_SIGN1 structure:

d28443a10103a054546869732069732074686520636f6e74656e742e58409393e0ffce5b91e68e0da09c59caa7995f4f285adf3eb28503419ebcb373bba332768e84ee947d0dcec0b920f32307d0b45a029a1695c1a8b50d453f5d29a004

Please confirm the following checks

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream module

[github-actions]

✅ Test Report | ${\color{lightgreen}Pass: 133/133}$ | ${\color{red}Fail: 0/133}$ |

[minikin]

lgtm