ci: add npm publish workflow triggered on version tags

Author: bntvllnt

.github/workflows/publish.yml

@@ -0,0 +1,43 @@
+name: Publish to npm
+
+on:
+  push:
+    tags:
+      - "v*"
+
+permissions:
+  contents: read
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10.28.2
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: pnpm
+          registry-url: https://registry.npmjs.org
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Verify (lint, typecheck, build, test)
+        run: |
+          pnpm lint
+          pnpm typecheck
+          pnpm build
+          pnpm test
+
+      - name: Publish to npm
+        run: npm publish --access public
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}