VisualStudio.Extensibility port

[Tech5G5G]

Currently, MVS is made with the VSSDK. Not-so-recently, Visual Studio received a new SDK for making extensions: VisualStudio.Extensibility. I do want to eventually port MVS to VisualStudio.Extensibility, but there still some things to be finalized in the SDK itself:

Settings

Settings are currently in preview and do not support the new options interface in Visual Studio. Instead, they are only accessible through a JSON file.

Autoload

Autoloading MVS at startup is another thing that might not yet be possible in VisualStudio.Extensibility, although it might using ExtensionConfiguration.LoadedWhen set to ActivationConstraint.SolutionState(SolutionState.NoSolution).

Alongside this, the port will need to use VisualStudio.Extensibility + VSSDK to run in-process to access WPF elements.