added restore options (#423)

* added restore options

src/Microsoft.SqlTools.Hosting/Hosting/Contracts/DmpServerCapabilities.cs

@@ -3,6 +3,8 @@
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 //
 
+using Microsoft.SqlTools.Hosting.Hosting.Contracts;
+
 namespace Microsoft.SqlTools.Hosting.Contracts
 {
     /// <summary>
@@ -19,5 +21,10 @@ namespace Microsoft.SqlTools.Hosting.Contracts
         public ConnectionProviderOptions ConnectionProvider { get; set; }
 
         public AdminServicesProviderOptions AdminServicesProvider { get; set; }
+
+        /// <summary>
+        /// List of features
+        /// </summary>
+        public FeatureMetadataProvider[] Features { get; set; }
     }
 }

src/Microsoft.SqlTools.Hosting/Hosting/Contracts/FeatureMetadataProvider.cs

@@ -0,0 +1,31 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using Microsoft.SqlTools.Hosting.Contracts;
+
+namespace Microsoft.SqlTools.Hosting.Hosting.Contracts
+{
+    /// <summary>
+    /// Includes the metadata for a feature
+    /// </summary>
+    public class FeatureMetadataProvider
+    {
+        /// <summary>
+        /// Indicates whether the feature is enabled 
+        /// </summary>
+        public bool Enabled { get; set; }
+
+        /// <summary>
+        /// Feature name
+        /// </summary>
+        public string FeatureName { get; set; }
+
+        /// <summary>
+        /// The options metadata avaialble for this feature
+        /// </summary>
+        public ServiceOption[] OptionsMetadata { get; set; }
+
+    }
+}