Upgrading to Kranz 0.8

The configuration path is an option

Up to 0.7, Kranz accepted a configuration file as its first positional argument. From 0.8 the first positional argument is always a subcommand, and a configuration path is passed with -f:

kranz prod.yaml     # 0.7
kranz -f prod.yaml  # 0.8

Kranz recognises the old shape and says what to do instead:

$ kranz prod.yaml
Kranz: unknown command "prod.yaml".
Did you mean `kranz -f prod.yaml`?

Bare kranz opens the TUI as before, and every 0.7 configuration file loads unchanged.