Version 1.4.0: Complete wsssh-server Debian package implementation

- Added comprehensive wsssh-server Debian package for wssshd daemon
- Created wssshd man page with complete documentation
- Updated build.sh to support wsssh-server package building
- Enhanced --server-only option to build server components
- Updated all version references to 1.4.0
- Improved package separation between server and client components
- Added PyInstaller binary packaging for standalone deployment
- Integrated init scripts with proper user/group management
- Added comprehensive postinst/postrm scripts for system integration
- Created /etc/default configuration files for service control
- Enhanced Debian packaging with professional standards compliance