- Implemented new base commands for system configuration:
* swap: Disable system swap
* selinux: Disable SELinux
* firewall: Stop and disable firewalld and ufw
* sysconfig: Modify system sysctl configuration
* ssh: Add SSH-related subcommands (key, port, config)
- Updated Config.go to initialize ConfigCache with default values
- Added new utility functions in FileUtils.go for file content manipulation
- Extended Excutor.go with HardCodeCommandExecutor method
