Smart displaying on Essays page

[jkellogg01]

Expected Behavior

• On the essays page, the user will see a list of essays available to read. Ideally, this will refer to the actual essays in assets/essays so it does not have to be manually updated when a new essay is uploaded.
• Clicking on an essay will take the user to a page that will:
  • Display the formatted markdown in the center of the page, with a max width of "prose" as specified by tailwind (I believe this is 65 characters)
  • Display a table of contents on the right-hand side, derived dynamically from the markdown itself.

[jkellogg01]

dynamic essay display works as of #6 (although there's no content to display right now). Still working on focus display.