feat(site-3): create index.php for site-3 with a greeting message
refactor(client): change setCgiSocket to accept unique_ptr for better memory management
fix(AConfig): adjust getCGIPath to correctly prepend dot to extension
refactor(CgiProcess): update CGI process handling to use unique_ptr for CgiSocket
refactor(URI): enhance logging for CGI checks and improve condition checks
refactor(Router): clean up commented code and add debug logging for CGI process
fix(Server): improve error logging for epoll_ctl failures
