v0.2.0 - First Tagged Release: Complete ZKP Implementation

This is the first tagged release of the Chaum-Pedersen ZKP implementation, bringing together all previous improvements plus major new enhancements.

🔧 CI/CD & Development

• Fixed broken GitHub Actions workflow - Added missing protobuf compiler
• Standardized code formatting with rustfmt
• Added clippy linting with warnings as errors

📦 Dependencies & Compatibility

• Updated to tonic 0.12 and prost 0.13 for better compatibility
• Pinned rand at 0.8 for ecosystem stability
• Fixed compilation errors from version conflicts

📚 Documentation & Usability

• Complete README rewrite with step-by-step usage instructions
• Added table format for dependency documentation
• Added comprehensive CHANGELOG following Keep a Changelog format
• Clear examples showing the two-phase authentication process

🧪 Cryptography

• Robust Chaum-Pedersen Zero Knowledge Proof implementation
• Support for 1024-bit and 2048-bit RFC 5114 constants
• Comprehensive test suite covering multiple scenarios

Full Changelog: https://github.com/JohnBasrai/zkp-cp/commits/v0.2.0