ci(images): add workflow to optimize images on asset changes

.github/workflows/optimize-images.yml

@@ -0,0 +1,48 @@
+name: Optimize images
+
+on:
+  push:
+    branches: [ main, master ]
+    paths:
+      - 'src/assets/**'
+      - 'assets/**'
+  pull_request:
+    paths:
+      - 'src/assets/**'
+      - 'assets/**'
+  workflow_dispatch: {}
+
+jobs:
+  optimize:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run image optimizer
+        run: npm run optimize-images
+
+      - name: Commit optimized images
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add public/images || true
+          if ! git diff --staged --quiet; then
+            git commit -m "chore(images): add optimized WebP images [skip ci]" || echo "no changes to commit"
+            git push
+          else
+            echo "No optimized images to commit"
+          fi