ci: add automated testing

Doesn't actually succeed yet because there are quite a few errors.

.github/workflows/node.js.yaml

@@ -26,5 +26,6 @@ jobs:
         cache: 'npm'
     - run: npm ci
     - run: npm run build
-    # Tests are currently failing
-    # - run: npm test
+    - run: npm test
+      # Currently typescript, eslint, and prettier are unhappy
+      continue-on-error: true

package.json

@@ -136,7 +136,7 @@
     ],
     "moduleDirectories": [
       "node_modules",
-      "release/app/node_modules"
+      "src"
     ],
     "testPathIgnorePatterns": [
       "release/app/dist"