info command could provide more information about the VMs #160
Description
The info subcommand of a falcon binary (e.g. a4x2 or interop) could provide more VM state information, which would be helpful for debugging.
For example, the first thing that would be helpful is to have a "running" or "created" field that lets the user know whether the VM has actually been instantiated and whether there's anything currently running.
It would also be nice if this could be used as a discovery mechanism to figure out if there are other propolis VMs running on the system, even if they were launched from a different falcon directory (or from a different falcon binary).
Another item that could be included would be the filepath to falcon/propolis log files, so the user doesn't have to know ahead of time about the .falcon directory and what the various files are.