infra: add publish workflow (#979)

.github/workflows/publish.yml

@@ -0,0 +1,35 @@
+name: Publish
+
+on:
+  workflow_dispatch:
+
+jobs:
+  release:
+    if: github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    name: Release
+    steps:
+      - name: Checkout
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@a3252b78c470c02df07e9d59298aecedc3ccdd6d # v3.0.0
+
+      - name: Set node version to 20
+        uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2
+        with:
+          node-version: 20
+          cache: 'pnpm'
+
+      - name: Prepare
+        run: pnpm install --frozen-lockfile
+
+      - name: Set publishing config
+        run: pnpm config set '//registry.npmjs.org/:_authToken' "${NODE_AUTH_TOKEN}"
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+      - name: Publish
+        run: |
+          PACKAGE_DIST_TAG=$(node -e "console.log(/^\d+\.\d+\.\d+(\-(\w+)\.\d+)$/.exec(require('./package.json').version)?.[2] || 'latest')")
+          pnpm publish --access public --tag $PACKAGE_DIST_TAG