Add CustomSchemeURLParser that enables to parse custom scheme URL and get a deep link path at the end.

Riot/Modules/DeepLink/CustomSchemeURLConstants.swift

@@ -0,0 +1,28 @@
+// 
+// Copyright 2020 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+
+enum CustomSchemeURLConstants {
+    
+    enum Parameters {
+        static let transactionId = "transaction_id"
+    }
+    
+    enum Hosts {
+        static let connect = "connect"
+    }
+}