feat: introduce the 'flyAndZoomTo' event

[boazpoolman]

Description

Added flyAndZoomTo that allows both the zoomTo and flyTo events to be fired as a single animation.

Checklist

I have not updated any documentation just yet, as I wanted to confirm that the maintainers of this package agree with the implementation decisions. For example, the leaflet flyTo event just allows an extra parameter if you'd also want to handle zoom (source). We could do the same thing for this package, but to prevent a breaking change the zoomLevel would have to become the 3rd parameter of the flyTo function, after animationDuration, which is not in line with the other events which all have the animationDuration as the last and optional param.

Please let me know if you agree with this PR, or if you'd like me to make any changes.

[mfazekas]

@boazpoolman thanks much for the PR,

Question: so we already have setCamera that allows one to set multiple things. What's the advantage of flyAndZoomTo ?

[boazpoolman]

I completely looked over the setCamera event.
Let me test this quickly this week. Sounds like this PR can be closed.

[boazpoolman]

Yep. The setCamera event does exactly what I need.
Didn't do my research properly, sorry about that.