Improvement: Adapt the matcher so we only match people that are within a certain timezone margin

[jannesiera]

While the matcher currently matches on overlapping time slots successfully, it creates situations where the people who get matched are in completely different timezones. We've received some feedback that when the timezone difference is too big (e.g. 10 hours) this can be a difficult experience.

We should extend the matcher with functionality to restrict the possible overlap if we which to do so (e.g. only match when people have <10 hours timezone difference).

[laenas]

I'll take responsibility for working on this, given that I ran into something like this last round 😅