Add Vercel Functions workflow and sync automation

Introduces a new GitHub Actions workflow for deploying to Vercel Functions and extends the sync workflow to auto-convert and push the codebase to a 'functions' branch for Vercel deployment. Updates workflow YAML files for consistent quoting and naming, refines documentation in CLAUDE.md for platform support and development, and updates package-lock.json dependencies.

.github/workflows/pages-eo.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: '22.11.0'
+          node-version: "22.11.0"
 
       - name: Deploy to EdgeOne Pages
         run: npx edgeone pages deploy . -n xget6 -t ${{ secrets.EDGEONE_API_TOKEN }}