Add GitHub Actions workflow to sync icons to CDN (#1435)

Introduces a workflow that syncs the 'icons' directory to a dedicated 'icons' branch and creates a versioned tag on each update. The workflow triggers on changes to the 'icons' folder in the main branch or via manual dispatch, and outputs CDN URLs for accessing the synced icons.

.github/workflows/sync-icons.yml

@@ -0,0 +1,105 @@
+name: Sync Icons to CDN
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'icons/**'
+
+  workflow_dispatch:
+
+jobs:
+  sync-icons:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout main branch
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+      - name: Sync icons and create release tag
+        id: sync
+        run: |
+          CDN_BRANCH="icons"
+          SOURCE_FOLDER="icons"
+
+          if [ ! -d "$SOURCE_FOLDER" ]; then
+            echo "No $SOURCE_FOLDER folder found"
+            exit 0
+          fi
+
+          # Get version from package.json
+          VERSION=$(node -p "require('./package.json').version")
+          VERSION_TAG="icons-v${VERSION}"
+
+          echo "Package version: $VERSION"
+          echo "Tag: $VERSION_TAG"
+
+          # Check if tag already exists
+          if git ls-remote --tags origin | grep -q "refs/tags/${VERSION_TAG}$"; then
+            echo "Tag $VERSION_TAG already exists, skipping"
+            echo "has_changes=false" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+
+          # Store icons in temp location
+          mkdir -p /tmp/icons-sync
+          cp -r $SOURCE_FOLDER/* /tmp/icons-sync/
+
+          MAIN_SHA=$(git rev-parse --short HEAD)
+
+          # Setup CDN branch
+          if git ls-remote --heads origin $CDN_BRANCH | grep -q $CDN_BRANCH; then
+            git checkout $CDN_BRANCH
+            find . -maxdepth 1 ! -name '.git' ! -name '.' -exec rm -rf {} +
+          else
+            git checkout --orphan $CDN_BRANCH
+            git rm -rf .
+          fi
+
+          # Copy icons to root
+          cp -r /tmp/icons-sync/* .
+
+          git add -A
+
+          if git diff --staged --quiet; then
+            echo "No changes to sync"
+            echo "has_changes=false" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+
+          git commit -m "v${VERSION}"
+          git push -u origin $CDN_BRANCH --force-with-lease
+
+          # Create versioned tag
+          git tag $VERSION_TAG
+          git push origin $VERSION_TAG
+
+          echo "has_changes=true" >> $GITHUB_OUTPUT
+          echo "version_tag=$VERSION_TAG" >> $GITHUB_OUTPUT
+
+      - name: Output CDN URLs
+        if: steps.sync.outputs.has_changes == 'true'
+        run: |
+          REPO="${{ github.repository }}"
+          TAG="${{ steps.sync.outputs.version_tag }}"
+
+          echo "═══════════════════════════════════════════════════════════"
+          echo "  CDN URLs"
+          echo "═══════════════════════════════════════════════════════════"
+          echo ""
+          echo "  https://cdn.jsdelivr.net/gh/${REPO}@${TAG}/<filename>"
+          echo ""
+          echo "  Browse: https://cdn.jsdelivr.net/gh/${REPO}@${TAG}/"
+          echo ""
+          echo "═══════════════════════════════════════════════════════════"