Implement the SpaceAddRoomsScreen. (#4951)

* Update proxies ready for adding rooms to a space.

- ClientProxy.recentlyVisitedRooms to take a filter and to return room proxies.
- Expose SpaceServiceProxy.addChildToSpace.

* Implement the SpaceAddRoomsScreen.

* Fix the designs of the selected carousels.

Add more snapshot tests for inviting users.

* Fix for screen using wrong avatar size.

ElementX/Sources/Screens/Spaces/SpaceAddRoomsScreen/SpaceAddRoomsScreenViewModelProtocol.swift

@@ -0,0 +1,16 @@
+//
+// Copyright 2026 Element Creations Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+// Please see LICENSE files in the repository root for full details.
+//
+
+import Combine
+
+@MainActor
+protocol SpaceAddRoomsScreenViewModelProtocol {
+    var actions: AnyPublisher<SpaceAddRoomsScreenViewModelAction, Never> { get }
+    var context: SpaceAddRoomsScreenViewModelType.Context { get }
+    
+    func stop()
+}