Add linting for ipynb files

.github/workflows/pynblint.yml

@@ -0,0 +1,25 @@
+# This is a basic workflow to help you get started with Actions
+
+name: pynblint
+
+# Controls when the workflow will run
+on: [push, pull_request]
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "lint"
+  lint:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v4
+      # Install pynblint
+      - name: Install pynblint
+        run: sudo pip install pynblint
+      - name: Install lxml[html_clean]
+        run: sudo pip install lxml[html_clean]
+      - name: Run pynblint
+        run: pynblint -y $GITHUB_WORKSPACE