Add readability report

.github/workflows/readability.yaml

@@ -0,0 +1,18 @@
+name: Report readability
+
+# This action only works on pull request events
+on: pull_request
+
+jobs:
+    report-readability:
+        name: Report readability
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout repo with history
+              uses: actions/checkout@v4
+              with:
+                  fetch-depth: 0
+            - uses: Rebilly/lexi@v2
+              with:
+                  github-token: ${{ secrets.GH_PAT }}
+                  glob: '**/*.md'