pico-init command is inconsistently named

[xiorcale]

Not a bug, but I find it strange that the command to initialize the VSO subsystem is called pico-init.

I don't really see what extra information does this bring? On top of that, if we look at the other commands from cmd/pico.go, none of them are prefixed with pico-.

So, why not just keep it simple and call it vso init, wouldn't this be a more consistend user exprerience?

p.s. I see that it was actually called init in the past: https://github.com/Vanilla-OS/vanilla-system-operator/commit/432f0da77ffed8b767543e5fe786cf1e53e0a8f4, so I'm really curious to understand what motivated this change 🤔