Also expose the awaiters to Microsoft.Test.Apex.VisualStudio

Move the remote part of NavigateTo down to the features layer now that RemoteHostClient is available there.'

Move Remote features down to lower levels now that the RemoteHostClient is available from the Workspace layer.

following up unit tests will add more tests and add proper listener to remove explicit delay

This change drops support for .NET 4.5 and retargets to desktop
4.6 + CoreCLR. It also fixes up various analyzer warnings that
were created due to the move.

Fixes #12926

Provide a specialized fix-all provider as the stock BatchFixAllProvider can't handle these close edits that this feature causes.

Add out of proc CodeLens processing

This type should have been moved originally.

Remove subtypes that are no longer needed because we have syntax
generator API to generate the syntax in language agnostic manner.

predefined type keyword to framework type.

The ImportGroup element is just noise.  It was also used very inconsistently in the repo and often within the same project file.  Just remove it.

this service will update solution checksum incrementally whenever workspace is changed.