feat: implement automated supporter recognition in README

- Add scripts/update_supporters.py to generate supporter list from JSON
- Set up GitHub Action to auto-update README.md on supporters.json change
- Update README.md with placeholders and personalized gratitude message

.github/workflows/update-supporters.yml

@@ -0,0 +1,31 @@
+name: Update Supporters in README
+
+on:
+  push:
+    paths:
+      - 'data/supporters.json'
+    branches:
+      - main
+  workflow_dispatch: # Allow manual trigger
+
+jobs:
+  update-readme:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.10'
+          
+      - name: Update README
+        run: python scripts/update_supporters.py
+        
+      - name: Commit and push changes
+        uses: stefanzweifel/git-auto-commit-action@v5
+        with:
+          commit_message: "docs: auto-update supporters list in README"
+          file_pattern: "README.md"