Add monthly GitHub Action to update Joplin plugin framework (#82)

.github/workflows/update-framework.yml

@@ -0,0 +1,59 @@
+name: Update Joplin Plugin Framework
+
+on:
+  schedule:
+    - cron: '0 0 1 * *'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  update-framework:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 18
+
+      - name: Install generator-joplin globally
+        run: npm install -g generator-joplin yo
+
+      - name: Run framework update
+        run: yo joplin --update
+
+      - name: Install dependencies
+        run: npm install --legacy-peer-deps
+
+      - name: Check for changes
+        id: changes
+        run: |
+          if git diff --quiet; then
+            echo "has_changes=false" >> $GITHUB_OUTPUT
+          else
+            echo "has_changes=true" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Create Pull Request
+        if: steps.changes.outputs.has_changes == 'true'
+        uses: peter-evans/create-pull-request@v6
+        with:
+          commit-message: 'chore: monthly joplin plugin framework update'
+          title: 'chore: update joplin plugin framework (automated)'
+          body: |
+            This is an automated pull request to update the Joplin plugin framework.
+
+            Please review the changes and ensure:
+            - All tests pass
+            - Build succeeds
+            - No breaking changes introduced
+          branch: chore/update-plugin-framework
+          branch-suffix: timestamp
+          delete-branch: true
+          labels: dependencies, automated