jack 3fb39b8a30 Add protocol version negotiation for future compatibility ...

- Add version negotiation messages (0x20 versionHello, 0x21 versionAck)
- Implement VersionHello and VersionAck message types with platform info
- Add ProtocolVersion struct for version management and negotiation
- Update BinaryProtocol to check supported versions
- Add version negotiation to connection flow before Noise handshake
- Maintain backward compatibility with legacy peers (assume v1)
- Add comprehensive test suite with 40+ test cases
- Update documentation with version negotiation details

This ensures BitChat clients can negotiate protocol versions for smooth
upgrades while maintaining full backward compatibility with existing clients.

2025-07-15 14:33:37 +02:00

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project.pbxproj

Add protocol version negotiation for future compatibility

2025-07-15 14:33:37 +02:00