CI: add link validation

.github/workflows/link-validation.yml

@@ -0,0 +1,36 @@
+name: Link Validation (Weekly Check)
+
+on:
+  schedule:
+    - cron: '0 6 * * 1'  # Mondays at 06:00 UTC
+  workflow_dispatch:  # Manual trigger
+
+jobs:
+  validate-links:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
+
+    - name: Set up Go
+      uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32  # v5.2.0
+      with:
+        go-version: stable
+
+    - name: Set up mdox
+      run: |
+        go install github.com/bwplotka/mdox@latest
+        export PATH="$(go env GOPATH)/bin:$PATH"
+        echo "PATH=$PATH" >> $GITHUB_ENV
+
+    - name: Check for broken links (no file modification)
+      run: |
+        export PATH="$(go env GOPATH)/bin:$PATH"
+        md_files=$(find . -type d -name node_modules -prune -o -name '*.md' -print)
+        mdox fmt --links.validate --check $md_files > link-report.txt 2>&1 || true
+
+    - name: Upload link check report
+      uses: actions/upload-artifact@v4
+      with:
+        name: link-report
+        path: link-report.txt

scripts/remove-broken-links.sh

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+#!/bin/bash
+set -e
+
+echo "Running link validation and removing broken links..."
+
+# Run mdox and capture output
+output=$(mdox fmt --links.validate --links.validate.config-file=.mdoxlintrc.yaml --check $(find . -name "*.md" -not -path "./node_modules/*" -not -path "./.next/*" -not -path "./.git/*") 2>&1 || true)
+
+# Parse broken HTTP/HTTPS links and remove them
+echo "$output" | grep -E '"https?://[^"]*" not accessible' | while read -r line; do
+    file=$(echo "$line" | cut -d: -f1)
+    url=$(echo "$line" | grep -oP '"https?://[^"]*"' | tr -d '"')
+
+    if [ -f "$file" ] && [ -n "$url" ]; then
+        echo "Removing broken link: $url from $file"
+        # Escape special characters for sed
+        escaped_url=$(echo "$url" | sed 's/[&/\]/\\&/g')
+        # Remove the link but keep the text if it's a markdown link [text](url)
+        sed -i -E "s|\[([^\]]*)\]\($escaped_url\)|\1|g" "$file"
+        # Remove plain URLs
+        sed -i "s|$escaped_url||g" "$file"
+    fi
+done
+
+echo "Broken link removal complete"