Fixes #43400

Addresses #45853

Hook up paste command to also automatically add usings. Operation uses thread await dialog to pop up to a user if it is taking a while with a "cancel" button. The dialog will not always show, but follows the IUIThreadOperationContext scope rules

Edit:

This is disabled by default. The following followup issues were filed
#49442
#49443
#49444

    1.  Creating an IBraceCompletionService to handle brace completion
	operations.
    2.  Moving the implementations from IEditorBraceCompletionSession to
	IBraceCompletionService for all sessions and converting from
	editor to document APIs where needed.
    3.  Repurpose IEditorBraceCompletionSession to interface between
	editor sync APIs and IEditorBraceCompletionService(s)

This feature originally existed in the C# editor layer, but then moved
to the VS layer once we split out EditorFeatures.Wpf; we didn't have a
CSharpEditorFeatures.Wpf so we had no place to put this since it had
dependencies on WPF at the time. It no longer has a direct WPF
dependency, so we can move this back to EditorFeatures and simply delete
the Cocoa copy.

The copy in EditorFeatures.Cocoa was verified to have no improvements
against the current code; there were some differences but those were
places where we made later fixes that hadn't been reflected into
EditorFeatures.Cocoa.

Fixes https://github.com/dotnet/roslyn/issues/34190

* Change Microsoft.CodeAnalysis.Test.Utilities solution folder

* Remove workaround for fixed NuGet bug.

* Remove unnecessary project references

* Rename Roslyn.Services.UnitTests.Utilities to Microsoft.CodeAnalysis.Workspaces.Test.Utilities

* Remove unneccessary project references

* Remove unnecessary references

* Rename Microsoft.CodeAnalysis.EditorFeatures.Test.Utilities to Microsoft.CodeAnalysis.EditorFeatures.Test.Utilities2

* Rename Roslyn.Services.Test.Utilities to Microsoft.CodeAnalysis.EditorFeatures.Test.Utilities

* Fixes

* Update Compilers.sln

This service does not depend on anything in the EditorFeatures layer, and can be easily ported over with just a couple of OptionsProvider fixups.

* Fix usage fo FatalError.Report*

* update handlers in VS and OOP to never fail-fast

* Replace ReportWithoutCrashAndPropagate with Report.

Both APIs propagate the exception. With the previous change ReportWithoutCrash now does not crash VS/OOP.

* Use MessagePack for ISB serialization

* DocumentHighlighting service

* Renamer, EncapsulateField, TupleToStruct services

* SymbolFinder and FindUsages services

* NavigateToSearch service

* FindUsages, References fixes

* AddImport service

* SymbolSearchUpdate service

* ExtensionMethodImportCompletion service

* DependentTypeFinder service

* GlobalNotificationDelivery service

* CodeLensReferences service

* Remove CodeAnalysis service

* Remove unused code

* Fix warnings.

* Remove unused

* Error reporting and logging

* Update StreamJsonRpc to 2.6.86-alpha

* Improve callback error handling.

* Update Watson reporting

* PR feedback

* Fix tests

* Fixes

* Remove unused field

* Rename shutdown service

* Switch diagnostic serialization from ObjectReader/Writer serializer to MessagePack

* Fix diagnostic reporting issue in ASP.NET apps

* Test compositions

* Eliminate TestExportProvider

* Fixes and caching

* Debugger proxies

* Scopes

* Feedback and more fixes

* RemoteHostOptions

* Throw without timeout on invalid thread switches

* EventCollectorTests requires a main thread

Co-authored-by: NCyrusNajmabadi <cyrus.najmabadi@gmail.com>

I am just a simple developer trying to send these cancellation tokens downstream where they belong