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/Connection/ConnectParams.cs

@@ -0,0 +1,37 @@
+//
+// 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.Connection
+{
+    /// <summary>
+    /// Parameters for the Connect Request.
+    /// </summary>
+    public class ConnectParams
+    {
+        /// <summary>
+        /// A URI identifying the owner of the connection. This will most commonly be a file in the workspace
+        /// or a virtual file representing an object in a database.         
+        /// </summary>
+        public string OwnerUri { get; set; }
+
+        /// <summary>
+        /// Contains the required parameters to initialize a connection to a database.
+        /// A connection will identified by its server name, database name and user name.
+        /// This may be changed in the future to support multiple connections with different 
+        /// connection properties to the same database.
+        /// </summary>
+        public ConnectionDetails Connection { get; set; }
+
+        /// <summary>
+        /// The type of this connection. By default, this is set to ConnectionType.Default.
+        /// </summary>
+        public string Type { get; set; } = ConnectionType.Default;
+
+        /// <summary>
+        /// The porpose of the connection to keep track of open connections
+        /// </summary>
+        public string Purpose { get; set; } = ConnectionType.GeneralConnection;
+    }
+}