Add MS Teams notification GH Action

.github/workflows/notify.yml

@@ -0,0 +1,36 @@
+name: Send MS Teams notification for new TILs
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  notify:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repo
+      uses: actions/checkout@v4
+      # We need full history to get the files that have been added:
+      with:
+        fetch-depth: 0
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.12
+    - uses: actions/cache@v4
+      name: Configure pip caching
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-
+    - name: Install Python dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+    - name: Send adaptive card notification to MS Teams
+      env:
+        TEAMS_WEBHOOK_URL: ${{ secrets.TEAMS_WEBHOOK_URL }}
+      run: |-
+        python notify_teams.py ${{ github.event.before }} ${{ github.event.after }}