Add links checking

Author: MarekSuchanek

.github/workflows/links.yaml

@@ -0,0 +1,29 @@
+name: Check links
+
+on:
+  pull_request:
+  push:
+  schedule:
+    - cron: "0 6 * * 1"
+  workflow_dispatch:
+
+jobs:
+  lychee:
+    name: Links in Markdown files
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v5
+
+      - name: Check links in Markdown files
+        uses: lycheeverse/lychee-action@v2
+        with:
+          fail: true
+          args: >-
+            --verbose
+            --no-progress
+            --timeout 20
+            --retry-wait-time 5
+            --max-retries 2
+            './**/*.md'