Create SplitViewPresentable used by the master view controller of a UISplitViewController and enables to abstract interaction.

Riot/Modules/SplitView/SplitViewPresentable.swift

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+// 
+// 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 UIKit
+
+protocol SplitViewMasterPresentableDelegate: class {
+    func splitViewMasterPresentable(_ presentable: Presentable, wantsToDisplay detailPresentable: Presentable)
+}
+
+/// Protocol used by the master view presentable of a UISplitViewController
+protocol SplitViewMasterPresentable: class, Presentable {
+        
+    var splitViewMasterPresentableDelegate: SplitViewMasterPresentableDelegate? { get set }
+    
+    /// Indicate true if the detail can be collapsed
+    var collapseDetailViewController: Bool { get }
+    
+    /// Return the detail view controller to display when the detail is separated from the master view controller
+    func secondViewControllerWhenSeparatedFromPrimary() -> UIViewController?
+}