v1.1.0-cpp

Additions

• Added Google Test as a submodule for unit tests
• Added Doxygen-style documentation for all public classes, methods, and important variables
• Added version macro
• Added SocketRAII wrappers for server and client

Changes

• Server logs now include broadcast message content
• Improved error handling and code organization
• Client input is now handled in its own thread

Fixes

• Improved logging consistency across files
• Fixed input not being sanitized from control characters