Feedback widget

[scottsfarley93]

With the addition of events in #183, there is now a mechanism for sending direct feedback about irrelevant or missing search results from the plugin. We should create a feedback widget that allows users to report such feedback during a search session. It could be really simple, but something that allows feedback to be directly surfaced would be super helpful in triaging and improving the search engine.

[andrewharvey]

I'm interested in what the UX would look like.

Like if no search results are found would it show some italicised click here to report a missing feature?
Or a small "improve these results" text below the results?

[katydecorah]

Per scrum today, we're going to hold on introducing the feedback widget in v4. I've removed the milestone label from this issue.

For context, we discussed appending a link "Submit search feedback" to the geocoder results. That link would open up https://labs.mapbox.com/geocoder-feedback/?search=myplace&options={} where we'd pass the query and the options set on the geocoder through the URL so that /geocoder-feedback can accept the parameters and allow the user to quickly submit their feedback.

A round up of things we need to scope/figure out to introduce this feature:

• Implementation of the feedback link [work in progress] feedback link #234
• Decide what updates we need to make to /geocoder-feedback (for example, update to React, Mapbox GL JS)