ci: add PR validation (#130)

Author: juliapampus

.github/workflows/pr-check.yml

@@ -0,0 +1,10 @@
+name: Check Pull Request
+
+on:
+  pull_request:
+    branches: [ main ]
+    types: [opened, edited, synchronize, reopened]
+
+jobs:
+  trigger-workflow:
+    uses: eclipse-dataspace-protocol-base/.github/.github/workflows/scan-pr-title.yml@main