Do better analysis

[Clerk](https://github.com/nextjournal/clerk) was just open sourced today and I am very excited. Nextjournal has been doing amazing things and I've taken much inspiration from their work, we seem to have the same taste in tooling. They provide a next-generation coding notebook experience, and have previously open-sourced [clojure-mode for Codemirror 6](https://github.com/nextjournal/clojure-mode) which I'd love to integrate into our web editor as well... but that's another issue.

The reason I'm so excited about Clerk is that it makes wonderful use of [tools.analyzer](https://github.com/clojure/tools.analyzer.jvm), and I tend to work best when given good examples to follow. The techniques they use to analyze Clojure files and gather comprehensive data to provide their live notebook environment will also apply to our purpose for analyzing user submissions.