ci: move publish on npm to separate workflow

.github/workflows/deploy-staging.yml

@@ -26,7 +26,3 @@ jobs:
         run: aws s3 sync ./storybook-static s3://${{ secrets.S3_BUCKET }} --delete
       - name: Invalidate Cloudfront
         run: aws cloudfront create-invalidation --distribution-id ${{ secrets.CLOUDFRONT_DISTRIBUTION }} --paths "/*"
-      - name: Publish package on NPM
-        run: npm publish
-        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.github/workflows/publish-npm.yml

@@ -0,0 +1,17 @@
+name: Publish on npm
+on:
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    environment: staging
+    steps:
+      - name: Setup Node.js 18
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18
+      - name: Publish package on NPM
+        run: npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}