* feat: add `info` command line subcommand
Adding an info command allows the documentation to refer to it when
mentioning platform specific information. This gives users a nicer
experience since they don't need to think about how `ncspot` will behave
on their system, but can run `ncspot info` to get that information.
* fix: info command don't create runtime directory
* fix: don't print runtime path on Windows
Windows doesn't use the runtime path so it shouldn't be printed there.
* fix: make `info` command easier to parse
* docs: add back the default configuration directory
Each user has their own runtime directory at `/run/user/<uid>`. Creating
the IPC socket in there makes sure it is cleaned up regardless of
whether `ncspot` exits normally.
BREAKING CHANGE: move IPC socket location
