Standard terminal emulator functions in Smart CLI (copy, scrollback, reset)

NetBrain Smart CLI currently does not provide standard terminal emulator functions found in common SSH clients. Users cannot select a word or line via double- or triple-click, cannot copy the full session output from the start of the terminal, cannot clear the scrollback buffer, cannot reset the terminal, and can only select and copy text that is currently visible on screen rather than longer command output. This enhancement would add these terminal emulation capabilities to Smart CLI, bringing its text selection, copy, and session management behavior in line with familiar terminal clients. Providing this functionality would allow engineers to rely solely on the NetBrain platform for device management tasks, removing the need to switch to external terminal tools for common copy and session-handling actions.