Add ns docstrings for most ns in src/main

- Added to CI now that it passes
- Added no-doc for docstrings that don't add any more than what's in the
ns name or for ones where I didn't know the ns that well

src/main/frontend/diff.cljs

@@ -1,4 +1,4 @@
-(ns frontend.diff
+(ns ^:no-doc frontend.diff
   (:require [clojure.string :as string]
             ["diff" :as jsdiff]
             [goog.object :as gobj]