Add Simple Template Example

- Add a simple Template example that shows a user profile with avatar, displayName and presence.
- ScreenCoordinator: closure based with less protocols and delegates.
- Reducer: Reducer function that manages all state modifications.
- SwiftUI View: Decomposes UI into appropriate sub components.
- Uses Theme and Dependency Management Infrastructure

RiotSwiftUI/Modules/Template/SimpleProfileExample/Model/TemplateUserProfileViewState.swift

@@ -19,4 +19,5 @@ import Foundation
 struct TemplateUserProfileViewState {
     let avatar: AvatarInputType?
     let displayName: String?
+    var presence: TemplatePresence = .offline
 }