Allow bundles to also have a configuration

[hlxid]

Description

Currently bundles don't have any config and if they want the user to be able to customize some things currently the bundle dev needs to create a GUI for it and things that need to be saved encrypted like other credentials aren't possible at all.

To solve this bundles should also have a configuration with a json schema simmilar like the ones of a service. This config should also be saved encrypted.

References

Discussion about this on discord