refac: rename argument --sleep-time to --interval
refac: rename signal_quality method to signal_strength
fix: signal_strength returns rssi instead of dBm
fix: regex_network_info: operator info may not be in modem answer
fix: network_info returns correct act information
fix keyboard interrupt while monitoring
typo
feat: add logging
refac: move tty connection logic in separate class
fix: add cfg file for screen