[CHORE] Switch from pnpm to npm

Hopefully this fixes the publish issues

Author: czottmann

.github/workflows/publish.yml

@@ -48,22 +48,21 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: "22.x"
+          node-version: "22"
           registry-url: "https://registry.npmjs.org"
 
-      - name: Install pnpm
-        uses: pnpm/action-setup@v4
-        with:
-          version: 10.20.0
+      # Ensure npm 11.5.1 or later is installed
+      - name: Update npm
+        run: npm install -g npm@latest
 
-      - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+      - name: Clean install
+        run: npm ci
 
       - name: Build
-        run: pnpm build
+        run: npm run build --if-present
 
       - name: Run tests
-        run: pnpm test
+        run: npm test
 
       - name: Publish to npm
         run: npm publish --provenance --access public