Build basic static HTML framework for displaying course content,

[brson]

Fill in with some draft and placeholder content.

I was hoping to have much more content by now, but I need to start landing something.

This is mostly building out a repository structure that supports the various content in the lesson plan, displayed in a consistent way. It does the following:

• Creates a place for "lessons", in the form of markdown that contains both slide and text material
• Creates a place for "projects", in the form of markdown project descriptions, and cargo projects containing example solutions and test suites.
• Makes everything navigable directly on github via markdown -> markdown links
• Makes everything navigable via a static website that also correctly displays the slides

I've also filled in content for the first part of the first project, after reading through @overvenus's solutions to the MIT course, and the MIT course's descriptions of its own projects.

The structure is similar to @skade's rust-three-days-course.

Rendered pages:

• README
• Lesson plan
• Project 1
• Lesson text
• Lesson slides

Note that the CSS here is just placeholder.

The vast majority of files here are just js libraries. The interesting stuff is

• the rendered static site, and navigation between the various content
• the lessons and projects folders
• the way every md file is paired with an html symlink to index.html
• the working slides on the static website
• the content inside project 1 ("tools"), which is admittedly very incomplete

Fixes tikv/tikv#4164.

Next steps:

• File bug to improve the CSS. Ask for help.
• File bug to limit the scope of an MVP - I'm thinking we'll start with the first and last projects, and a complete list of background readings necessary to complete them. Then later come back later and try to add additional lessons.
• Finish project 1 description
• File bug to finish code and tests for project 1. Ask for help.
• File bug to write the final project description. Ask for help.
• File bug to fill in the readings.

As always, feedback welcome.

cc @overvenus @Connor1996 @nolouch @Hoverbear @siddontang

[overvenus]

👍