ci: test doc generation

Author: kenranunderscore

.github/workflows/clojure.yml

@@ -12,3 +12,10 @@ jobs:
     - name: run Clojure tests
       run: nix develop -c lein test
     - run: PATH="$(pwd):$PATH" nix develop --impure -c lein figtest-headless
+
+  codox:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: DeterminateSystems/nix-installer-action@main
+    - run: nix develop -c lein codox