add ci workflow for e2e testing

.github/workflows/trigger-lightning-node-e2e.yml

@@ -0,0 +1,88 @@
+name: Trigger Lightning Node E2E Tests
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  # Need write permission to create status checks (optional)
+  pull-requests: write
+
+jobs:
+  trigger-e2e:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Verify token access to lightning-node repository
+        env:
+          LIGHTNING_NODE_REPO: ${{ vars.LIGHTNING_NODE_REPO || 'CumuloGlobal/lightning-node' }}
+          TOKEN: ${{ secrets.LIGHTNING_NODE_DISPATCH_TOKEN || secrets.GITHUB_TOKEN }}
+        run: |
+          REPO_OWNER=$(echo "$LIGHTNING_NODE_REPO" | cut -d'/' -f1)
+          REPO_NAME=$(echo "$LIGHTNING_NODE_REPO" | cut -d'/' -f2)
+
+          echo "Verifying access to repository: $LIGHTNING_NODE_REPO"
+
+          # Test if we can access the repository
+          HTTP_CODE=$(curl -s -o /dev/null -w "%{http_code}" \
+            -H "Authorization: token $TOKEN" \
+            -H "Accept: application/vnd.github.v3+json" \
+            "https://api.github.com/repos/$LIGHTNING_NODE_REPO")
+
+          if [ "$HTTP_CODE" = "200" ]; then
+            echo "✅ Successfully verified access to $LIGHTNING_NODE_REPO"
+          elif [ "$HTTP_CODE" = "404" ]; then
+            echo "❌ Repository not found: $LIGHTNING_NODE_REPO"
+            echo "Please verify:"
+            echo "  1. The repository name is correct"
+            echo "  2. The token has access to this private repository"
+            echo "  3. The token owner is a member of the '$REPO_OWNER' organization"
+            exit 1
+          elif [ "$HTTP_CODE" = "403" ]; then
+            echo "❌ Access forbidden. The token may not have sufficient permissions."
+            echo "Please verify:"
+            echo "  1. The token has 'repo' scope (for private repos)"
+            echo "  2. The token owner has access to the '$REPO_OWNER' organization"
+            echo "  3. The repository allows access from external tokens"
+            exit 1
+          else
+            echo "❌ Unexpected error (HTTP $HTTP_CODE) when accessing $LIGHTNING_NODE_REPO"
+            exit 1
+          fi
+
+      - name: Trigger Lightning Node E2E Tests
+        uses: peter-evans/repository-dispatch@v3
+        with:
+          token: ${{ secrets.LIGHTNING_NODE_DISPATCH_TOKEN || secrets.GITHUB_TOKEN }}
+          repository: ${{ vars.LIGHTNING_NODE_REPO || 'cumuloglobal/lightning-node' }}
+          event-type: mdk-checkout-pr
+          client-payload: |
+            {
+              "sha": "${{ github.event.pull_request.head.sha }}",
+              "ref": "${{ github.event.pull_request.head.ref }}",
+              "pr_number": ${{ github.event.pull_request.number }},
+              "pr_url": "${{ github.event.pull_request.html_url }}",
+              "repo": "${{ github.repository }}"
+            }
+
+      - name: Comment on PR
+        if: github.event_name == 'pull_request'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const lightningNodeRepo = '${{ vars.LIGHTNING_NODE_REPO || 'cumuloglobal/lightning-node' }}';
+            const comment = `🔗 Lightning Node E2E tests have been triggered for this PR.
+
+            View the workflow run: https://github.com/${lightningNodeRepo}/actions/workflows/external-e2e.yml
+
+            The tests will build packages from this PR branch and run integration tests against the Lightning Node infrastructure.`;
+
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: comment
+            });