Have done investigation for this already.
There will be 3 most common classes of integrations that can be done

• Template/Code editor based (Useful code snippets and validation)
• Service discovery (popular for Firebase and AWS based services)
  You login to IDE using your account and getting list of project and services available.
  Can generate your configuration etc.
• Build specific plugins and dependency management Gradle, CocoaPods etc.

The most important integration is IMHO build specific plugin, validator that can be done outside ide first.
I could not find anything useful for Visual Studio.