Version 0.6.2: ECDSA/ ECDH interface and Workflow enhancements

[HLRichardson-Git]

Issues encorporated:

• 28 ECDSA SigGen should take peer public key as parameter to make it easier to use
• 33 ECC algorithms should have a public key class
• 30 ECDH can be a little awkward to use
• 29 ECDSA should have a (optional?) hash parameter
• 32 GitHub CI actions

Description of changes:

This PR updates the library's version from 0.6.1 to 0.6.2, implementing several enhancements to the ECDSA interface, flexible hashing options, build consistency improvements, and continuous integration/ continuous development (CI/CD) setup. Here is a list of the major changes:

1. ECDSA Interface Updates

   • Added peerPublicKey as a parameter for ECDSA signature verification, allowing for improved control and usability in ECDSA.
   • Refactored ECC algorithms to utilize dedicated ECDSAPublicKey and ECDHPublicKey objects, enhancing code organization and clarity.
   • Introduced a HashAlgorithm enum to the ECDSA class, supporting flexible hash algorithm selection, including a None option as default so our testing did not have to be changed.

2. Build and Test Workflow Improvements

   • Implemented a new GitHub Actions CI workflow for automated builds and tests to maintain code quality across future changes.
   • Updated the CI configuration to trigger workflows on all release branches, giving maintainers more confidence a PR is at least passing the unit tests.

3. Documentation and Metadata Updates

   • Updated the README to reflect changes to the ECDSA interface and provide example code.
   • Updated the changelog in CHANGES to list the changes introduced here.
   • Added mirzaim to the special thanks section of AUTHORS.md.

Release notes:

• Adds peerPublicKey as parameter for ECDSA signature verification
• Adds ECDSAPublicKey and ECDHPublicKey to be used for ECC public keys in place of old Point class
• Adds HashAlgorithm enum as parameter to ECDSA signature generation/ verification to select hash to be used
• Refactors ECDH to force user to pass ECDHPublicKey as parameter to compute shared secret for simplicity
• Implements CI/CD GitHub action workflow to run unit tests on push/PR to main or release branches