ci: add npm publish workflow on release

Author: eduardbar

.github/workflows/publish.yml

@@ -0,0 +1,46 @@
+name: Publish to npm
+
+on:
+  release:
+    types: [published]
+  push:
+    tags:
+      - 'v*'
+
+permissions:
+  contents: read
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          registry-url: 'https://registry.npmjs.org'
+          cache: 'npm'
+
+      - name: Verify version matches tag
+        run: |
+          TAG_VERSION="${GITHUB_REF#refs/tags/v}"
+          PKG_VERSION=$(node -p "require('./package.json').version")
+          if [ "$TAG_VERSION" != "$PKG_VERSION" ]; then
+            echo "Error: Tag version ($TAG_VERSION) does not match package.json version ($PKG_VERSION)"
+            exit 1
+          fi
+          echo "Version check passed: $PKG_VERSION"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Publish to npm
+        run: npm publish --access public
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}