RTD: summarize lookup arguments

[joseph-robertson]

Pull Request Description

This PR:

• Adds remaining arguments (i.e., <arg_name>=auto) to options_lookup.tsv so that every ResStockArguments argument is included.
• Adds a unit test to ensure that all ResStock arguments are called out in options_lookup.tsv.
• By housing characteristic parameter, automates summarizing Arguments sets used in options_lookup.tsv (including Name, Required, Units, Type, Choices, Description). See below for example.
• Adds a README.md.erb to all ResStock measures so that README.md documentation is automatically generated.
• Adds introduction in Housing Characteristics for describing subsections and the "auto" argument choice. See below.

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Checklist

Not all may apply:

• [ ] ~Tests (and test files) have been updated~
• [x] Documentation has been updated
  • [ ] ~If related to resstock-estimation, checklist includes data dictionary, source report, options saturation, options_lookup.~
• [x] Changelog has been updated
• [x] openstudio tasks.rb update_measures has been run
• [x] No unexpected regression test changes on CI (checked comparison artifacts)

[shorowit]

I realize you've already gone down a certain path and I'm coming to it late, but I can't help but wonder if it would be simpler to just include every argument in the options_lookup.tsv somewhere. Could even write a test to make sure they are all covered.

[shorowit]

Related: https://github.com/NREL/OpenStudio-HPXML/issues/1518

[joseph-robertson]

Suggestion from @afontani: We probably want to link to argument descriptions.

[joseph-robertson]

We need to better orient readers of the Housing Characteristics page to the idea of "auto" and what that means, how things connect to OS-HPXML documentation and HPXML fields, etc.

We should have a paragraph up front on "auto", and then for each ResStock parameter we should have link(s) to the related OS-HPXML documentation sections (e.g., HVAC Heating Efficiency -> HPXML Heating Systems, HPXML Heat Pumps).

Edit: related to https://github.com/NREL/OpenStudio-HPXML/issues/1252.

[joseph-robertson]

Need to either (A) wait for source_report formatting updates, or (B) fix some of the list item indentation issues.