CLI command to reset local state

[tegefaulkes]

Specification

This needs to be further speced out. For now I'm thinking it's an agent command that will just clear all of the local state. But wouldn't that just be a bootstrap or start with --fresh?

Additional context

Related #40 (comment)

Tasks

1. Expand the specification

[tegefaulkes]

@CMCDragonkai could you add some requirements and context to this?

[CMCDragonkai]

I'm thinking there should be 2 similar commands:

1. pk agent restart - this restarts the agent - ideally in some zero down time sense - note that it would need to "work well" with any systemd or process orchestrator that runs the PK agent in foreground
2. pk agent destroy - yes --fresh is simlar, but the difference here is that it's about stopping and destroying the state (kind of like if you got to wipe everything out quickly)

This extra destroy command might be dangerous, and should require some additional prompt. Like "are you sure?" and users could force it with --force.