build: add publish workflow

.github/workflows/publish.yml

@@ -0,0 +1,52 @@
+name: Publish
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          registry-url: https://registry.npmjs.org/
+      - run: npm ci
+      - run: npm run build
+
+      # Extract version from package.json and determine release channel
+      - name: Parse version and determine release channel
+        id: version
+        run: |
+          VERSION=$(node -p "require('./package.json').version")
+          echo "PACKAGE_VERSION=$VERSION" >> $GITHUB_OUTPUT
+
+          if [[ $VERSION == *"-alpha."* ]]; then
+            echo "NPM_TAG=alpha" >> $GITHUB_OUTPUT
+            echo "PRERELEASE=true" >> $GITHUB_OUTPUT
+          elif [[ $VERSION == *"-beta."* ]]; then
+            echo "NPM_TAG=beta" >> $GITHUB_OUTPUT
+            echo "PRERELEASE=true" >> $GITHUB_OUTPUT
+          else
+            echo "NPM_TAG=latest" >> $GITHUB_OUTPUT
+          fi
+
+      # Publish with the appropriate tag
+      - name: Publish to npm
+        run: npm publish --tag ${{ steps.version.outputs.NPM_TAG }}
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+      # Only create GitHub releases for stable versions
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          generate_release_notes: true
+          prerelease: ${{ steps.version.outputs.PRERELEASE == 'true' }}
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+permissions:
+  contents: write