Add workflows for broken links (#20)

* Add Broken Links workflow

* Add Dependabot configuration for GitHub Actions updates

* add explicit lychee-action output

Co-authored-by: ccoVeille <3875889+ccoVeille@users.noreply.github.com>

* Add .lycheeignore to exclude badgen blocking requests

* change issue label to dead-link

---------

Co-authored-by: ccoVeille <3875889+ccoVeille@users.noreply.github.com>

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/broken-links.yml

@@ -0,0 +1,28 @@
+name: Broken-Links
+
+on:
+    workflow_dispatch:
+    schedule:
+        - cron: "11 11 * * 0"   # once a week at 11:11 UTC on Sunday, avoid rush hours
+
+jobs:
+  linkChecker:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write # required for peter-evans/create-issue-from-file
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Link Checker
+        id: lychee
+        uses: lycheeverse/lychee-action@v2
+        with:
+          fail: false
+          output: ./lychee/out.md
+      - name: Create Issue From File
+        if: steps.lychee.outputs.exit_code != 0
+        uses: peter-evans/create-issue-from-file@v5
+        with:
+          title: Link Checker Report
+          content-filepath: ./lychee/out.md
+          labels: dead-link

.lycheeignore

@@ -0,0 +1,2 @@
+# remove badgen as it seems to block lychee user agent/github actions requests
+https://badgen.net/