[Platform] Graceful failover when `persistenceService` is not provided about openmct

[VWoeltjen]

Thanks for reporting this - this is a big omission

I think there's two different sub-issues here:

1. There's no platform implementation of a persistence service that can be used to run "out of the box."
2. When there is no provider available for a composite service that is used by some loaded bundle, the application fails to load.

For (1), I'd like to move example/localStorage into platform, and add with a status indicator saying "Local storage" with a tooltip indicating that changes are being stored in-browser and won't be available from other devices or other browsers.

For (2), I think that is more of an architectural issue. A missing dependency causing an unrecoverable failure seems okay to me, and the developer console is an appropriate place to display that warning. What I don't like is that we don't have a way to define more graceful failure mechanisms on a service-by-service basis (in the case of persistence, you could recover by warning the user that they won't be able to save anything.) Adding a proposal to address this as part of our API redesign

[danielpacak]

Makes sense for me. BTW, I've recently faced a similar problem for persisting interconnected data in a web browser for demo/selling purpose and I ended up with this "crazy?" idea: https://github.com/SOFTWARE-CLINIC/sc-embedded-database.