docs: add auto-update sponsors workflow

.github/workflows/sponsors.yml

@@ -0,0 +1,30 @@
+name: Update Sponsors
+
+on:
+  schedule:
+    # Run daily at 00:00 UTC
+    - cron: '0 0 * * *'
+  workflow_dispatch: # Allow manual trigger
+
+jobs:
+  sponsors:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Update Sponsors
+        uses: JamesIves/github-sponsors-readme-action@v1
+        with:
+          token: ${{ secrets.SPONSORS_TOKEN }}
+          file: 'README.md'
+          organization: true
+          active-only: true
+
+      - name: Commit and Push
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add README.md
+          git diff --staged --quiet || git commit -m "docs: update sponsors"
+          git push