[v3] Add configlet CI workflow

.github/workflows/configlet.yml

@@ -0,0 +1,16 @@
+name: Configlet CI
+
+on: [push, pull_request, workflow_dispatch]
+
+jobs:
+  configlet:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f
+
+    - name: Fetch configlet
+      uses: exercism/github-actions/configlet-ci@main
+        
+    - name: Configlet Linter
+      run: configlet lint .