chore: move script to src layout and make a package

.github/workflows/ci.yml

@@ -6,6 +6,7 @@ on:
   pull_request:
     branches:
       - master
+
 jobs:
   test:
     strategy:

.github/workflows/do-lint.yml

@@ -0,0 +1,25 @@
+name: Lint
+on:
+  push:
+    branches:
+      - "*"
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    name: "Run linters on code base"
+    steps:
+      - name: Setup Python for linting
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
+      - name: Install tox
+        run: python -m pip install tox tox-gh-actions
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Lint code base
+        run: tox -e style