ci: auto-sync wiki pages to GitHub wiki on merge

.github/workflows/wiki-sync.yml

@@ -0,0 +1,30 @@
+name: Wiki Sync
+
+on:
+  push:
+    branches: [main]
+    paths: ['wiki/**']
+
+jobs:
+  sync-wiki:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Sync wiki pages
+        run: |
+          git clone https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.wiki.git wiki-repo
+          rm -rf wiki-repo/*.md
+          cp wiki/*.md wiki-repo/
+          cd wiki-repo
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add -A
+          if git diff --cached --quiet; then
+            echo "No changes to sync"
+          else
+            git commit -m "Sync wiki from main"
+            git push
+          fi