Sandbox had to be enabled in order to submit binary to App Store
Connect, therefore command line arguments cannot be used to tell
if the app was started by the launcher.
However, given that launcher starts app in hidden state, we can
safely assert that if the app is hidden on start, it was started
by the launcher.
See f33380b4e2
Also drop automatic signing on Mac bundle and unused utils.
Use bundle as a means to provide Mac APIs to Catalyst app.
In order to cross the @objc wall set by the Mac Bundle mechanism,
Swift structures cannot be used directly and must be bridged
through ObjC facades.
Create NSMenu in MVVM style and install it on app launch. Make
sure to do it in AppDelegate.applicationDidFinishLaunching(),
because doing it as early as in PassepartoutApp.init() would
crash Mac code.
Use .representedObject to own view models.
With menu in place, app can be sent to background when main window
is closed. Requires multiple documents support for app not to die
instantly.
