[Feature Request]: Trackers with authentication

[EnergoStalin]

Preflight checklist

• I have searched the issue tracker for a bug report that matches the one I want to file, without success.
• I have searched the features list for this feature, and I couldn't find it.
• I have checked that I'm using the latest stable version of the app.

Problem Description

In addition to #398. If you want to use tracker with some kind of authorization you screwed.

Proposed Solution

For now at least add possibility to pass raw json data to extensions. Something like gear button in extension list view which for now will open plain textarea where you can paste required settings manually.

As long term UI solution it can be conveniently done via some kind of json contract like it's done in insomia on plugin side it looks like this. Since it's only few elements would be needed in simple scenario like text input and checkbox. There's no need for any library.