Reapply "Merge pull request #15 from winapps-org/add-contribution-guidelines"

This reverts commit 2dd0980cc9.

.github/workflows/lictool.yaml

@@ -0,0 +1,21 @@
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  lictool:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: 3.x
+
+      - uses: pre-commit/action@v3.0.1
+        with:
+          extra_args: license-tools
+
+      - uses: pre-commit-ci/lite-action@v1.0.2
+        if: always()