I see actions for navigateToURL and navigateToSobject, etc, but not NavigateToLightningApp?
Per the documentation on pageReference types it is possible to navigate to an app using URLs with the app’s developer name such as
A few other examples from the documentation:
URL Format Examples
Navigate to the app’s homepage using the appId
Navigate to an object record’s page in the app using the appId
Navigate to the app’s homepage using the appDeveloperName
Navigate to an object record’s page in the app using the