add black formattin action for github

Author: naspert

.github/workflows/black.yaml

@@ -0,0 +1,15 @@
+name: Lint
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: psf/black@stable
+        with:
+          options: "--check -l 150"
+          src: "."
+          version: "~= 22.0"
+