ci: add a lint pipeline

.github/workflows/ci.yml

@@ -0,0 +1,18 @@
+name: Lint
+on: [push, pull_request]
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Checkout the repository
+        uses: actions/checkout@v3
+
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v1
+        with:
+          python-version: "3.8"
+
+      - name: Checks Black formatting
+        uses: psf/black@stable