ci: add link checker

Author: bearomorphism

.github/workflows/links.yml

@@ -0,0 +1,46 @@
+name: Links
+
+on:
+  repository_dispatch:
+  workflow_dispatch:
+  pull_request:
+  schedule:
+    - cron: "00 18 * * *"
+
+jobs:
+  linkChecker:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write # required for peter-evans/create-issue-from-file
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Link Checker
+        id: lychee
+        uses: lycheeverse/lychee-action@v2
+        with:
+          fail: false
+
+      - name: Warn on broken links in PR
+        if: steps.lychee.outputs.exit_code != 0 && github.event_name == 'pull_request'
+        run: |
+          echo "::warning::Link checker found broken links."
+          if [ -f ./lychee/out.md ]; then
+            echo "## 🔗 Link Checker Report" >> $GITHUB_STEP_SUMMARY
+            echo "" >> $GITHUB_STEP_SUMMARY
+            echo "The link checker found broken links in this pull request:" >> $GITHUB_STEP_SUMMARY
+            echo "" >> $GITHUB_STEP_SUMMARY
+            cat ./lychee/out.md >> $GITHUB_STEP_SUMMARY
+          else
+            echo "## 🔗 Link Checker Report" >> $GITHUB_STEP_SUMMARY
+            echo "" >> $GITHUB_STEP_SUMMARY
+            echo "The link checker found broken links. Please check the workflow logs for details." >> $GITHUB_STEP_SUMMARY
+          fi
+
+      - name: Create Issue From File
+        if: steps.lychee.outputs.exit_code != 0 && github.event_name == 'schedule'
+        uses: peter-evans/create-issue-from-file@v5
+        with:
+          title: Link Checker Report
+          content-filepath: ./lychee/out.md
+          labels: 'type: documentation'

docs/README.md

@@ -1,4 +1,5 @@
 [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/commitizen-tools/commitizen/pythonpackage.yml?label=python%20package&logo=github&logoColor=white&style=flat-square)](https://github.com/commitizen-tools/commitizen/actions)
+[![Check Links](https://github.com/commitizen-tools/commitizen/actions/workflows/links.yml/badge.svg)](https://github.com/commitizen-tools/commitizen/actions/workflows/links.yml)
 [![Conventional Commits](https://img.shields.io/badge/Conventional%20Commits-1.0.0-yellow.svg?style=flat-square)](https://conventionalcommits.org)
 [![PyPI Package latest release](https://img.shields.io/pypi/v/commitizen.svg?style=flat-square)](https://pypi.org/project/commitizen/)
 [![PyPI Package download count (per month)](https://img.shields.io/pypi/dm/commitizen?style=flat-square)](https://pypi.org/project/commitizen/)