Docs - Restore features that were removed with the dependency update

[alexanderson1993]

The dependency update caused issues with the plugins that were used to render the docs, so I simplified it substantially. The downside is a bunch of features that were in the old docs have been removed. We should add some of them back.

• Github Flavored Markdown parsing
• Syntax highlighting for codeblocks
• Table of contents navigation
• Inline images