Make experience field in task creation an antd select component

[philippotto]

We could render a "Tags" field (third example in first column here: https://ant.design/components/select/). In the on-change handler we could make sure that not more than one tag is active. Then, we would have auto-complete + the possibility to enter a new experience domain.

Not sure whether there's a backend route for gathering the experiences, @fm3?

[fm3]

There is not, I think, but of course we can add it

[philippotto]

There is not, I think, but of course we can add it

That would be great! Could you do this in the context of this issue?

[fm3]

@MichaelBuessemeyer I added the route api/tasks/experienceDomains in PR #3060 (already merged) so feel free to adapt the frontend :)