How can the time be adjusted in Zorro to match my local time (UTC +1 in my case)?

Is there some sort of crosshair pointer in Zorro chart available? If I want to see the values of a ohlc/average or the exact time of a bar or whatever, how would I do that?

Why do you want to adjust it in the first place? Zorro uses GMT by default for a good reason - to avoid confusion and make things more universal across pleora of different markets and timezones.

As of now Zorro's built-in charting library doesn't support crosshairs, but as far as I remember, this feature was in the to-do list.

Probably out of habit, but now as you mention it you've got a point here.
As for the charting, well, it has not arrived yet in 2023.