feat: add check to skip already published npm packages

Author: yaonyan

.github/workflows/publish.yml

@@ -43,7 +43,14 @@ jobs:
         run: |
           for dir in __*_*/dist; do
             cd "$dir"
-            npm publish --access public --provenance
+            NAME=$(node -p "require('./package.json').name")
+            VERSION=$(node -p "require('./package.json').version")
+
+            if npm view "$NAME@$VERSION" version 2>/dev/null; then
+              echo "Skipping $NAME@$VERSION (already published)"
+            else
+              npm publish --access public --provenance
+            fi
             cd ../..
           done
         env: