[Feature request] Save the resources status between up/down cycles

Describe the Feature You Want

We have a decent amount of services across a few Tiltfiles of our multiple systems. Each time I change between systems I have to individually disable resources what I don't want to run in that particular system. That would be nice to somehow persist that information. First I thought --output-snapshot-on-exit will do that for me, but I tried it and resources came up again.

Current Behavior

If I disable a resource, that will came back after "Down and Up" again.

Why Do You Want This?

That would make it lot easier to change between systems.

Additional context I tried to write an extension for this by using the config.clear_enabled_resources() and config.set_enabled_resources(...), but I couldn't get information about the status of the services. If there would be a config.get_resources(), maybe I can get it periodically and save the state into a file.

If I just missed something can you direct me to the right direction how should I add this behavior? Otherwise that would be nice to add a flag for that just like how the --output-snapshot-on-exit works. If you point me to the direction I can work on it once we have an established plan for the implementation.