add GitHub Actions workflow for NPM package publishing

.github/workflows/npm-publish.yml

@@ -0,0 +1,48 @@
+# This workflow will run tests using node and then publish a package to GitHub Packages when a release is created
+# For more information see: https://docs.github.com/en/actions/publishing-packages/publishing-nodejs-packages
+
+name: NPM Package Publish
+
+on:
+  push:
+    branches: [main]
+  release:
+    types: [created]
+  workflow_dispatch:
+
+jobs:
+  publish-npm:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          registry-url: https://registry.npmjs.org/
+
+      - uses: pnpm/action-setup@v2
+        with:
+          version: latest
+      - uses: oven-sh/setup-bun@v2
+      - run: pnpm install
+      - run: pnpm build
+      - run: |
+          PACKAGE_NAME=$(jq -r '.name' package.json)
+          PACKAGE_VERSION=$(jq -r '.version' package.json)
+
+          # Get the version from npm registry
+          REGISTRY_VERSION=$(npm show "$PACKAGE_NAME" version)
+
+          # Compare versions
+          if [ "$PACKAGE_VERSION" == "$REGISTRY_VERSION" ]; then
+            echo "Version $PACKAGE_VERSION already exists in the npm registry."
+            exit 0
+          else
+            echo "Version $PACKAGE_VERSION does not exist in the npm registry. Proceeding..."
+            npm publish --provenance --access public
+          fi
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}