Filter for answered questions too

[jhonatasrm]

Summary

Today, we've established the default value of 0 for responses to questions in the filter. I suggest it would be beneficial to introduce configurability regarding the option to search for previously answered questions.

Motivation

Enable the addon user to filter for questions that have already been answered but not marked as solved.

Describe alternatives you've considered

Removing the maximum response parameter from the forum question, however, this would result in an influx of numerous questions, encompassing both answered and unanswered ones, while also eliminating the option for users to select between answered and unanswered queries. I'd appreciate hearing suggestions and alternatives as well.

Additional context

Include an additional option on the following settings screen:

[dannycolin]

IMO, #130 would probably be closer to what volunteers would expect. The main blocker is the API that doesn't offer a simple way to track this information. We would have to send a request for each questions and compare the update field in the API response.

I think the best solution would be to implement something upstream that let us track this thing of user activity and expose it through the API. Bonus point if we can have a GraphQL API instead of the REST API.