DC-5259 Added Lychee Link Checker (#7192)

* added workflow

* lychee checker updated

* update link again

* lychee updated

* revert back

* edit fail conditions

* check 2

* lychee changed

* workign dir

* args updated

* added comment

* lychee tol added

* edited toml

* typo fixed

* typos

* args renoved

* removed include

* added extensions

* minor updates

* update

* update

* update

* arg changes

* changed comment system

* cache added

* test

* output fixed

* broken link to test

* fail on broken links

* sytyle changes

* file path change

* conflict

* exclusions

* timeout and cache changes

* quiet flag

* name change and old toml file removed

* tanstack fixed

* cache timeout changed to 6 hours

* tedt reponse

* changes

* name change

* broken link fixewd

* extra `EOF` removed

* low cache number to check

* update to only comment on non-forked prs

* cache put back to 6 hours

* cache test 1

* cache check removed

* cache changed to 5 minutes for test

* cache 3 hours

* concurrency checks added

* test: trigger lychee workflow

* minor text change

Author: aidankmcalister

.github/workflows/lychee.yml

@@ -0,0 +1,76 @@
+name: 🍈 Lychee
+
+on: [pull_request]
+
+concurrency:
+  group: lychee-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  check-links:
+    name: Check links
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: 🍈 Lychee Link Checker
+        id: lychee
+        uses: lycheeverse/lychee-action@v2
+        with:
+          fail: false
+          output: ../lychee/out.md
+          args: >
+            --cache
+            --max-cache-age 3h
+            --verbose
+            --no-progress
+            --accept 200,201,204,304,403,429
+            --timeout 20
+            --max-retries 5
+            --retry-wait-time 5
+            --max-concurrency 16
+            --exclude 'http://localhost.*'
+            --exclude 'https://localhost.*'
+            --exclude 'https://dev.mysql.com/.*'
+            --exclude 'https://www.mysql.com/.*'
+            --exclude 'https://www.gnu.org/.*'
+            --exclude 'https://www.cockroachlabs.com/.*'
+            --exclude '^/.*'
+            './**/*.md' './**/*.mdx'
+          workingDirectory: "content"
+        env:
+          GITHUB_TOKEN: ${{ secrets.github_token }}
+
+      - name: 📝 Clean up Lychee Report
+        if: ${{ always() && github.event.pull_request.head.repo.fork == false }}
+        run: |
+          if [ -f "lychee/out.md" ]; then
+            # Read the original output
+            ORIGINAL=$(cat lychee/out.md)
+            
+            # Create formatted output
+            cat > lychee/formatted.md << 'EOF'
+          ## 🍈 Lychee Link Check Report
+
+          > **Note:** Links are cached for 3 hours to avoid unnecessary requests, and speed up consecutive runs.
+
+          ### 📊 Results Overview
+
+          EOF
+            
+            # Append the original content with title replacement
+            echo "$ORIGINAL" | sed 's/^# Summary$//' | sed 's/^## Summary$//' >> lychee/formatted.md
+          fi
+
+      - name: 📝 Comment Broken Links
+        if: ${{ always() && github.event.pull_request.head.repo.fork == false }}
+        uses: peter-evans/create-or-update-comment@v4
+        with:
+          issue-number: ${{ github.event.pull_request.number }}
+          body-path: lychee/formatted.md
+
+      - name: 🚫 Fail if broken links found
+        if: ${{ steps.lychee.outputs.exit_code != 0 }}
+        run: exit ${{ steps.lychee.outputs.exit_code }}