feature: generate default names for containers

[khionu]

We should generate a 2-part name using words from a predefined dictionary that are 3-6 characters long, so people using kratactl can type that instead of the UUID, in case of contexts (like ZelliJ over SSH, cough) that make copy/paste less viable.

I'm unsure if this could be a vector for security issues, but if so, we could have this only occur when a flag is passed, or maybe only on manual launch vs other forms of deployment.