[skip changelog] Add task and workflow to check for dead links in docs

Author: silvanocerza

.github/workflows/link-validation.yaml

@@ -0,0 +1,25 @@
+name: Verifies documentation links
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  schedule:
+    - cron: "0 3 * * 1" # Every Monday at 03:00
+
+jobs:
+  verify-links:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Install Taskfile
+        uses: Arduino/actions/setup-taskfile@master
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Verify links
+        run: task docs:check-links

Taskfile.yml

@@ -54,6 +54,12 @@ tasks:
     cmds:
       - npx {{ .PRETTIER }} --check "**/*.md"
 
+  docs:check-links:
+    desc: Verifies there are no dead links in documentation
+    dir: docs
+    cmds:
+      - npx -p markdown-link-check -c 'for file in **/*.md; do markdown-link-check -q "$file"; done'
+
   docs:format:
     desc: Automatically formats documentation
     cmds: