Application selection at build time

Fix DisplayAppRecovery so it builds with -std=c++20.

src/displayapp/DisplayAppRecovery.cpp

@@ -121,3 +121,12 @@ void DisplayApp::PushMessage(Display::Messages msg) {
 
 void DisplayApp::Register(Pinetime::System::SystemTask* /*systemTask*/) {
 }
+
+void DisplayApp::Register(Pinetime::Controllers::WeatherService* /*weatherService*/) {
+}
+
+void DisplayApp::Register(Pinetime::Controllers::MusicService* /*musicService*/) {
+}
+
+void DisplayApp::Register(Pinetime::Controllers::NavigationService* /*NavigationService*/) {
+}