Additional Configuration Steps Missing From Visual Studio Documentation

**Your Godot version:**
master branch

**Issue description:**
After running `scons platform=windows vsproj=yes dev_build=yes` as suggested in the Visual Studio documentation, the provided `.sln` file seems incomplete.

Several modules throughout the project aren't detected by intellisense, as shown above. The project builds, so I do not believe the issue is in the scons scripts themselves. The documentation must be missing some additional configuration steps to get intellisense working in Visual Studio.

**URL to the documentation page (if already existing):**
https://docs.godotengine.org/en/stable/contributing/development/configuring_an_ide/visual_studio.html