Github workflow for Publishing to NPM

.github/workflows/publish-npm.yaml

@@ -0,0 +1,57 @@
+name: Publish useMultiTabDetection to NPM
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          registry-url: "https://registry.npmjs.org"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test --if-present
+        continue-on-error: false
+
+      - name: Build package
+        run: npm run build --if-present
+
+      - name: Check if version already published
+        id: check-version
+        run: |
+          PACKAGE_NAME=$(node -p "require('./package.json').name")
+          PACKAGE_VERSION=$(node -p "require('./package.json').version")
+
+          if npm view "$PACKAGE_NAME@$PACKAGE_VERSION" version 2>/dev/null; then
+            echo "Version $PACKAGE_VERSION already exists on NPM"
+            echo "skip=true" >> $GITHUB_OUTPUT
+          else
+            echo "Version $PACKAGE_VERSION not yet published"
+            echo "skip=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Publish to NPM
+        if: steps.check-version.outputs.skip == 'false'
+        run: npm publish --provenance
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+      - name: Skip publishing
+        if: steps.check-version.outputs.skip == 'true'
+        run: echo "Skipping publish - version already exists on NPM"