Remove the default command #361
Description
What needs to get done
Remove support for the dispatcher's default command.
Why it needs to get done
A default command was added to craft-cli to maintain compatibility with Snapcraft. Default commands aren't a good UX practice and no other craft app supports them.
Snapcraft will drop the default command in the same major release that adds support for core26, so craft-cli can drop support for it in a major release too.