message: chore: Add sideEffects field to proxy package.json's
diff: @@ -285,6 +285,7 @@ function getProxyPackageContents(rootPath, moduleName) {
  const json = {
  name: `${name}/${moduleName}`,
  private: true,
  + sideEffects: false,
  main: join(prefix, mainDir, moduleName),
  ...(moduleDir ? { module: join(prefix, moduleDir, moduleName) } : {}),
  ...(typesDir ? { types: join(prefix, typesDir, moduleName) } : {})
  