chore: add publish workflow

Author: paulrobertlloyd

.github/workflows/publish.yml

@@ -0,0 +1,31 @@
+name: publish
+
+on:
+  push:
+    tags:
+      - "v*"
+
+permissions:
+  id-token: write # Required for OIDC
+  contents: read
+
+jobs:
+  publish:
+    name: Publish to npm
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version-file: ".nvmrc"
+          registry-url: "https://registry.npmjs.org"
+      - name: Update npm
+        run: npm install -g npm@latest # Ensure npm 11.5.1 or later is installed
+      - name: Install dependencies
+        run: npm ci
+      - name: Run tests
+        run: npm test
+      - name: Publish to npm
+        run: npm publish