Ameobea/homepage

 * There is a problem with my current stack of Gatsby plugins (not really that surprising tbh) that caused blog posts that used backticks to create code blocks in headings would lead to literal escaped `<code>` tags to get generated in the text of created headers.
 * This commit pulls in a workaround repo that someone made to address this problem.

 * Fix TOC links to that they correctly link to the current page
 * Add a Gatsby plugin for showing pound-links next to each of the headings that display on hover
  * Add a custom SVG element for this which is white

 * Automatically generate TOCs via `gatsby-transformer-remark` and insert them into blog post documents
 * Set some custom styling on the TOC
  * Add a Gatsby SASS plugin and SASS loader to allow the use of SASS files

 * Change theme of prismsjs code on all site markdown (and perhaps elsewhere, I don't remember how far that reached)

 * Remove some indentation rules from `.eslintrc` since they were interfering with prettier (false positives in `eslint`)
 * Commit `triangles/Cargo.lock` and remove it from `.gitignore` (idk why that was set up that way)

 * Add image, project page, and entry in the project manifest
 * Tweak portfolio page styles to prevent very large images
 * Tweak homepage style to fix extremely long song titles
 * Fix some broken links to everynoiseatonce that were caused by faulty string replacement
   * Literally today did I learn that JS's `.replace()` function on strings only replaces the first match by default unless you use a Regex with the `/g` flag set...
 * Rename some files to make them TypeScript and add types