Docs: Add links, fix grammar, formatting, wording (#22381)
Docs: Add links, fix grammar, formatting, wording (#22381)

* Docs: Add links, fix grammar, formatting, wording

- Add links to theme files and technology references
- Adjust formatting to be consistent, e.g., syntax highlighting, section spacing
- Fix misc grammar, punctuation
- Fix SASS -> Sass

Co-Authored-By: Arve Knudsen <ddb1ca96248d128f0719f3f79aee1e346dace4b9@gmail.com>
Co-Authored-By: Diana Payton <ee24b2c2426ceb8f7f9d3f1e01be1306fa31b8a1@users.noreply.github.com>
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