Add CI step for herb linting (#6341)

Co-authored-by: Colby Swandale <colby@cinnabar.city>

Author: larouxn

.github/workflows/lint.yml

@@ -20,6 +20,18 @@ jobs:
           bundler-cache: true
       - name: Rubocop
         run: bundle exec rubocop
+  herb:
+    name: Herb 🌿
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0
+        with:
+          bundler-cache: true
+      - name: Herb Analyze
+        run: bundle exec herb analyze
   brakeman:
     name: Brakeman
     runs-on: ubuntu-24.04