* Added Persistent Workload guide using Host Volumes
* Update website/source/guides/stateful-workloads/stateful-workloads.html.md
Co-Authored-By: Danielle <dani@hashicorp.com>
* fix client config and job spec formatting
* fix typo in description
* fix navigation for both stateful workloads guides
* show output from nomad node status to verify host volumes
* Add value prop info; info about HA
From feedback, added more information about the value proposition for
host volumes (h/t @rkettelerij), and corrected an orphaned bit from
the original guide this one was created from.
