Move unused forked code to external directory (#1192)

* Move unused forked code to external directory

* Fix SLN build errors

* Add back resource provider core since it's referenced by main resource provider project

* Update PackageProjects step of pipeline

external/Microsoft.SqlTools.DataProtocol.Contracts/ServerCapabilities/ServerCapabilities.cs

@@ -0,0 +1,122 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+namespace Microsoft.SqlTools.DataProtocol.Contracts.ServerCapabilities
+{    
+    public class ServerCapabilities
+    {
+        /// <summary>
+        /// Defines how text documents are synced. Is either a detailed structure defining each
+        /// notification or for backwards compatibility the TextDocumentSyncKind number.
+        /// </summary>
+        /// TODO: Use the Union type
+        public TextDocumentSyncKind TextDocumentSync { get; set; }
+        
+        /// <summary>
+        /// Whether the server provides code actions. Can be <c>null</c>
+        /// </summary>
+        public bool? CodeActionProvider { get; set; }
+        
+        /// <summary>
+        /// Options that the server provides for code lens. Can be <c>null</c> to indicate code
+        /// lens is not supported.
+        /// </summary>
+        public CodeLensOptions CodeLensProvider { get; set; }
+        
+        /// <summary>
+        /// Options that the server supports for completion. Can be <c>null</c> to indicate
+        /// completion is not supported.
+        /// </summary>
+        public CompletionOptions CompletionProvider { get; set; }
+        
+        /// <summary>
+        /// Whether the server provides goto definition support. Can be <c>null</c>
+        /// </summary>
+        public bool? DefinitionProvider { get; set; }
+        
+        /// <summary>
+        /// Whether the server provides document formatting. Can be <c>null</c>
+        /// </summary>
+        public bool? DocumentFormattingProvider { get; set; }
+        
+        /// <summary>
+        /// Whether the server provides document highlight support. Can be <c>null</c>
+        /// </summary>
+        public bool? DocumentHighlightProvider { get; set; }
+        
+        /// <summary>
+        /// Options the server supports for document linking. Can be <c>null</c> to indicate the
+        /// feature is not supported
+        /// </summary>
+        public DocumentLinkOptions DocumentLinkProvider { get; set; }
+        
+        /// <summary>
+        /// Options that the server supports for document formatting on type. Can be <c>null</c> to
+        /// indicate the feature is not supported
+        /// </summary>
+        public DocumentOnTypeFormattingOptions DocumentOnTypeFormattingProvider { get; set; }
+        
+        /// <summary>
+        /// Whether the server provides document symbol support. Can be <c>null</c>
+        /// </summary>
+        public bool? DocumentSymbolProvider { get; set; }
+        
+        /// <summary>
+        /// Options the server supports for executing commands. Can be <c>null</c> to indicate the
+        /// feature is not supported.
+        /// </summary>
+        public ExecuteCommandOptions ExecuteCommandProvider { get; set; }
+        
+        /// <summary>
+        /// Any experimental features the server supports
+        /// </summary>
+        /// TODO: Should this be a parameterized type?
+        public object Experimental { get; set; }
+        
+        /// <summary>
+        /// Whether or not the server supports goto implementation requests. Can be <c>null</c> 
+        /// </summary>
+        /// TODO: Union type
+        public bool? ImplementationProvider { get; set; } 
+        
+        /// <summary>
+        /// Whether the server provides hover support. Can be <c>null</c>
+        /// </summary>
+        public bool? HoverProvider { get; set; }
+        
+        /// <summary>
+        /// Whether the server provides find references support. Can be <c>null</c>
+        /// </summary>
+        public bool? ReferencesProvider { get; set; }
+        
+        /// <summary>
+        /// Whether the server provides support for renaming. Can be <c>null</c>
+        /// </summary>
+        public bool? RenameProvider { get; set; }
+        
+        /// <summary>
+        /// Options that the server supports for signature help. Can be <c>null</c> to indicate
+        /// completion is not supported
+        /// </summary>
+        public SignatureHelpOptions SignatureHelpProvider { get; set; }
+        
+        /// <summary>
+        /// Whether the server provides goto type definition support. Can be <c>null</c>
+        /// </summary>
+        /// TODO: Union type
+        public bool? TypeDefinitionProvider { get; set; }
+        
+        /// <summary>
+        /// Options specific to workspaces the server supoorts. Can be <c>null</c> to indicate the
+        /// server does not support workspace requests.
+        /// </summary>
+        public WorkspaceCapabilities Workspace { get; set; }
+        
+        /// <summary>
+        /// Whether the server provides workpace symbol support. Can be <c>null</c>
+        /// </summary>
+        public bool? WorkspaceSymbolProvider { get; set; }
+    }
+}