[develop]: Add plotting and template variable documentation

[gspetro-NOAA]

DESCRIPTION OF CHANGES:

• Added a plotting configuration section to RunSRW.rst
• Deleted Graphics.rst (all relevant info has been added to RunSRW.rst) and removed/updated references to the Graphics chapter throughout the docs.
• Updated ConfigWorkflow.rst with variables related to the addition of plotting to the workflow
• Added chapter on Template Variables based on @gsketefian 's closed Issue Include documentation for using templates in the experiment configuration file #198. (Includes updates due to the switch to a python workflow and a concrete example (COMOUT_REF) from the plotting tasks.)

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

TESTS CONDUCTED:

None required (all documentation). I built the docs on my RTD account: https://srw-ug.readthedocs.io/en/text-plotting/index.html

Note that ReadTheDocs did dependencies updates on 1/26/22 and 1/4/23 that seem to be causing issues rendering bullet points properly. This will make any bulleted lists in our docs ugly, but the information is still there. I don't think the issue relates to anything I did, since the bullets are not rendering properly anywhere in the docs (including lists I didn't touch). There was also no problem with my RTD builds from 12/22/22.

• hera.intel (out of the box case)

DEPENDENCIES:

N/A.

DOCUMENTATION:

All documentation.

ISSUE:

Issue #525
Issue #482
Issue #230

CHECKLIST

• My code follows the style guidelines in the Contributor's Guide
• I have performed a self-review of my own code using the Code Reviewer's Guide
• I have commented my code, particularly in hard-to-understand areas N/A
• My changes need updates to the documentation. I have made corresponding changes to the documentation
• My changes do not require updates to the documentation (explain). N/A
• My changes generate no new warnings
• New and existing tests pass with my changes N/A
• Any dependent changes have been merged and published N/A

CONTRIBUTORS (optional):

@danielabdi-noaa @gsketefian @EdwardSnyder-NOAA

[MichaelLueken]

@gspetro-NOAA Thank you very much for updating the plotting and template variable documentation! For the most part, everything looks great! I have noted a few minor spelling issues in ConfigWorkflow.rst.

[MichaelLueken]

@gspetro-NOAA I have one more comment, this time in RunSRW.rst - would it be best to replace $HOME with $SRW on line 566? In the BuildSRW chapter, it suggests that users create an environment variable pointing to their cloned SRW App and call it $SRW. It might be best to push for the use of this environment variable.

[MichaelLueken]

@gspetro-NOAA Thank you very much for addressing my concerns! Approving this work now.

[danielabdi-noaa]

These documentation changes look good to me! Whatever is going on with the workflow for plotting is not related to the docs so approving!