'edgly something' does not show help and returns with exit code 0

Running `edgly something` where "something" is an unsupported command does not print anything and exits with 0. Instead it should show the help output and exit with 1.

Start by running `edgly something` and trace the CLI entry point that handles unsupported commands. Done means the command prints the help output and exits with status 1 instead of producing no output and returning 0.

Written by the indexing model from the issue text.