Add python formatting with black workflow" (#57)

* Added python formatting with black workflow

* Rename snapshot generation workflow

Author: kwk

.github/workflows/generate-snapshot-tarballs.yml

@@ -1,4 +1,4 @@
-name: generate-snapshot-tarballs
+name: "Generate LLVM snapshot tarballs"
 
 # PURPOSE:
 #

.github/workflows/python-formatting-with-black.yml

@@ -0,0 +1,14 @@
+name: "Python formatting with black"
+
+# See https://black.readthedocs.io/en/stable/integrations/github_actions.html
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: psf/black@stable
+        with:
+            options: "--check --diff --verbose --color"