Ensure PR Manager tests are run in CI

.github/workflows/prManagerTest.yml

@@ -0,0 +1,33 @@
+# Run the autoamted test suite for the PR manager in case it changes.
+name: PR Manager Test
+
+on:
+  pull_request:
+    paths:
+      # Only run in case the PR Manager code changes.
+      - '.github/prManager'
+
+# We use the default concurrency grouping of allowing a single workflow per branch/PR/tag to run at the same time.
+# In case of PRs we only care about the results for the last workflow run, so we cancel workflows already in progress
+# when new code is pushed, in all other cases (branches/tags) we want to have a history for commits so it's easier to
+# find breakages when they occur (head_ref is non-empty only when the workflow is triggered from a PR).
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.head_ref != '' }}
+
+defaults:
+  run:
+    shell: bash
+
+manage:
+  runs-on: ubuntu-latest
+  steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-node@v4
+      with:
+        node-version: 20
+    - run: npm ci
+      working-directory: ./.github/prManager
+
+    - run: npm run test
+      working-directory: ./.github/prManager