Top level deeplink handling (#1660)

* Handle link opening on the top most levels and prepare for percolating them throughout the app
* Add support for a custom app scheme
* Add specific AppRoute parsers.
* Integrate custom scheme in the AppRouteURLParser
* Switch to `element://call` and cleanup route parsing

ElementX/Sources/Screens/Settings/NotificationSettingsScreen/View/NotificationSettingsScreen.swift

@@ -79,10 +79,6 @@ struct NotificationSettingsScreen: View {
                 }
                 .padding(.horizontal, ListRowPadding.horizontal)
                 .padding(.vertical, 8)
-                .environment(\.openURL, OpenURLAction { url in
-                    context.send(viewAction: .linkClicked(url: url))
-                    return .systemAction
-                })
             })
         }
     }