* 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 <arve.knudsen@gmail.com>
Co-Authored-By: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>