[Feature Request] Modular Add-on Support

[drinfernoo]

Is your feature request related to a problem? Please describe.
Currently, the wizard defines chunks of its add-on support in multiple different places. Definitions for data saving are defined in debridit.py, loginit.py, and traktit.py, respectively... but cache files and the like are defined in multiple locations across a handful of scripts.

Describe the solution you'd like
Ideally, each add-on could define any fields that can be saved, as well as any cache files to clear, in a single non-Python (such as JSON) file, allowing for easier maintenance and cleaner code regarding add-on support.