Create custom sidebar for theme wiki

[reubenlillie]

Organize all wiki pages (existing and proposed) in outline form in a custom sidebar. This will help with planning issues/pull requests on the project board.

[reubenlillie]

I’ve created the sidebar. Now we have to create issues and assign them to the appropriate project board.

1. Create an issue
2. Write documentation [remove documentation label when finished]
3. Write code