Add Dependabot config and simplify deploy workflow

Introduces .github/dependabot.yml to automate dependency updates for npm and GitHub Actions. Streamlines the deploy job in depoly.yml by removing setup, install, lint, type-check, and test steps, focusing only on code checkout and deployment via Wrangler.

.github/workflows/depoly.yml

@@ -17,30 +17,9 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     timeout-minutes: 60
-    name: Deploy to Cloudflare Workers
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: '20'
-          cache: 'npm'
-
-      - name: Install dependencies
-        run: npm ci
-
-      - name: Run linter
-        run: npm run lint
-
-      - name: Run type check
-        run: npm run type-check
-
-      - name: Run tests
-        run: npm test
-
-      - name: Build & Deploy Worker
+      - uses: actions/checkout@v4
+      - name: Deploy Worker
         uses: cloudflare/wrangler-action@v3
         with:
           apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}