Sphinx build documentation

[michaelcdevin]

Description

Documentation on the contents of the docs directory, with descriptions of how to run Sphinx builds and basics on how build_docs.py operates.

Type of PR

• Bug fix
• New feature
• Documentation
• Other: (specify)

Checklist for PR

• Authors read the contribution guidelines
• The pull request is from an issue branch (not main) on your fork, to the dev branch in WecOptTool.
• The authors have given the admins edit access
• All changes adhere to the style guide including PEP8, Docstrings, and Type Hints.
• Modified the documentation if applicable
• Modified or added a new test
• All tests pass
• Reference or close any relevant issues

[coveralls]

Pull Request Test Coverage Report for Build 12998682717

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 94.514%

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Totals
Change from base Build 12996485111:	0.0%
Covered Lines:	2774
Relevant Lines:	2935

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💛 - Coveralls

[jtgrasb]

Docs are clear and helpful. Merging now.