Create npmpublish on demand.yml

.github/workflows/npmpublish on demand.yml

@@ -0,0 +1,33 @@
+name: manage npm release on demand
+
+on: workflow_dispatch
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16.x
+      - run: |
+          npm ci
+          npm run build --workspace=packages/svgcanvas
+          npm run lint
+          npm run test
+          npm run build
+
+  publish-npm:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+          registry-url: https://registry.npmjs.org/
+      - run: npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}
+
+