Add publish workflow.

.github/workflows/publish.yml

@@ -0,0 +1,24 @@
+name: Publish package
+
+on:
+  release:
+    types: [ created ]
+
+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: 20
+          cache: 'yarn'
+          registry-url: 'https://registry.npmjs.org'
+      - run: yarn install --immutable
+      - run: yarn build
+      - run: npm publish --provenance --access public
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}