How is it possible to export all Visual Studio Code settings and plugins and import them to another machine?
There is an extension for Visual Studio Code, called Settings Sync.
It synchronises your settings by gist (Gist by GitHub). It works the same as the Atom.io extension called settings-sync.
UPDATE:
This feature is now built into VS Code, it is worth switching to the official feature. (https://stackoverflow.com/a/64035356/2029818)
You can now sync all your settings across devices with VSCode's built-in Settings Sync. It's found under Code > Preferences > Turn on Settings Sync...