Updated Documentation for #976, fixed other documentation issues, and generally cleaned up the doc build

[SteveMcGrath]

Description

Documentation cleanup, bug fixes, and addressing warnings.

Fixes #976

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• This change requires a documentation update

How Has This Been Tested?

Manually running the sphinx HTML builder. Builds now result in a clean build (no errors or warnings).

The HTML pages are in _build/html.
❯ make clean
Removing everything under './_build'...
❯ make html
Running Sphinx v7.4.7
loading translations [en]... done
making output directory... done
Converting `source_suffix = '.rst'` to `source_suffix = {'.rst': 'restructuredtext'}`.
loading intersphinx inventory 'python' from https://docs.python.org/3/objects.inv...
loading intersphinx inventory 'requests' from https://requests.readthedocs.io/en/latest/objects.inv...
loading intersphinx inventory 'restfly' from https://restfly.readthedocs.io/en/latest/objects.inv...
building [mo]: targets for 0 po files that are out of date
writing output...
building [html]: targets for 156 source files that are out of date
updating environment: [new config] 156 added, 0 changed, 0 removed
reading sources... [100%] testing
looking for now-outdated files... none found
pickling environment... done
checking consistency... done
preparing documents... done
copying assets...
copying static files... done
copying extra files... done
copying assets: done
writing output... [100%] testing
generating indices... genindex py-modindex done
highlighting module code... [100%] tenable.tenableone.tags.api
writing additional pages... search done
dumping search index in English (code: en)... done
dumping object inventory... done
build succeeded.

The HTML pages are in _build/html.