vscode additions

common/docs/UsefulCommands.txt

@@ -51,5 +51,9 @@ https://docs.npmjs.com/getting-started/fixing-npm-permissions
 [admin]
  - top for io/disk: sudo iotop -oPa
 
+[VSCode]
+- list all extensions:
+  code --list-extensions | xargs -L 1 echo code --install-extension
+
 [react-native]
 react-native bundle --platform android --dev false --entry-file index.android.js --bundle-output android/app/src/main/assets/index.android.bundle --assets-dest android/app/src/main/res