Issue #49 - Add METplus instructions to the Jetstream2 tutorial (#56)

* Roll back change to usecases.rst

* Draft of the Jetstream2-Matthew tutorial instructions

The instructions still need to be retested and the text vetted by Rich.  It would be great if we could have a section at the end to validate or see the results.

* Tests to see what Markdown format I should really use

* Crazy-ass markdown language

* Sigh

* Switch the incorrect markdown to the correct, yet horrible, version

* Edit text, fix typos and links

* Make sure all commands work properly, add more info.

* A few more tweaks before others view it

* Revisions based on feedback and some procedural changes

* Final edits before initial publication

* fixed URL links, fixed header underline lengths, added link to matthew jetstream page from use cases page

* added ID so heading can be linked using :ref:

* use double underscores to create anonymous reference for links that have the same text

* updated versions of actions to prevent node.js deprecated warnings

* added orphan identifier to prevent warning that this page is not included in the toctree

* fixed typos

* Refactor the existing doc in preparation for adding METPlus doc

* Add initial version of METPlus instructions

These steps were migrated from work by George, modified to fit with the WRF instructions already present here.

* Tweaks to documentation after full testing

The final upper_air analysis still fails due to a lack of pressure level data files from the WRF simulation.

* Get METPlus working

Also moved around some of the commands and updated some text.

* Edits from final testing pass on new and revised content

* Final tweaks before creating a pull request

* Add text about viewing the output of METPlus

* changed METPlus to METplus

* split long docker run commands into multiple lines for better readability

* ignore auto-generated file

* use env var to reference obs data volume to more easily adapt to other use cases

* rewording and avoid using analysis to describe the METplus verification step to avoid confusion withe the METplus Analysis tools that will be added later to generate images

* A few formatting tweaks after the code review

* ignore auto-generated file

* Refactor instructions in preparation for edits related to changes in how WRF is run.

* Add a run script and config file and update the existing config file to work with new documentation

* change run.sh permissions

* Remove data downloading from run.sh

* Finalize edits of the tutorial to use config files from new location and add data download steps.

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Co-authored-by: George McCabe <23407799+georgemccabe@users.noreply.github.com>