Function init_logger 

pub fn init_logger(level: u8) -> Result<()>

Initializes tracing logger

• level - A log level. If the PSCR_LOG environment variable is given, PSCR_LOG is preferred and level is ignored.
  • 0 - ""
  • 1 - "info"
  • 2 - "debug"
  • 3 and more - "trace"

releated: Args::verbose