ci: generate contributors.png on contributor updates

Author: skyash-dev

.github/workflows/contributors-png.yml

@@ -0,0 +1,47 @@
+name: Generate Contributors PNG
+
+on:
+  push:
+    paths:
+      - '.all-contributorsrc'
+
+jobs:
+  build:
+    if: github.ref == 'refs/heads/main' && github.repository == 'processing/p5.js'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Install system deps for canvas
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            libcairo2-dev \
+            libjpeg-dev
+
+      - name: Install dependencies
+        run: npm install canvas node-fetch
+
+      - name: Run contributors-svg generator
+        run: node utils/contributors-png.js
+
+      - name: Reset all changes except contributors.png
+        run: |
+          git restore --staged .
+          git add contributors.svg
+          git checkout -- .
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v7
+        with:
+          commit-message: "Update contributors.png from .all-contributorsrc"
+          branch: update-contributors-svg
+          title: "chore: update contributors.png from .all-contributorsrc"
+          body: "This PR updates the contributors.png to reflect changes in .all-contributorsrc"
+          add-paths: contributors.svg
+          token: ${{ secrets.ACCESS_TOKEN }}