refac(map): Update `maxZoom` at map-level and map fit on location bbox

[wkyoshida]

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Description

• Configured maxZoom at the map-level rather than per-layer:
  • Different per-layer configurations resulted in the CyclOSM layer hiding while the default layer remained visible - which is the expected behavior definitely, but may be confusing if the user specifically toggles to see the cycling profile. A configured maxZoom on the entire map avoids this.
  • Went with maxZoom: 19 as that is the lowest max zoom available as per docs:
    • Default layer is z19
    • CyclOSM layer is z20

Showcasing some of what I was thinking with #964 ...

• Modified to fit the map on the bbox of the event location:
  • This frees the map from relying on a generic zoom level for all events and fits on a zoom more appropriate for a given location.
  • Configured some settings, but these can be modified definitely if alternatives are preferred:
    • duration: 6000 sets the duration of the map fitting/zooming animation to 6 seconds
    • padding: 100 fits the map with an additional 100 pixels of padding around the bbox - useful so that the fit is not too zoomed-in
  • Note FYI - The bbox coordinates passed into fitBounds() may appear funky, but that is just due to the different bbox formats used by Nominatim and MapLibre
    • Nominatim: south Latitude, north Latitude, west Longitude, east Longitude
    • MapLibre: west Longitude, south Latitude, east Longitude, north Latitude

Related issue

• Kinda related to #964 ?

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[andrewtavis]

Points on this, @wkyoshida :)

• Definitely agree that this is a better approach so that the zoom can be more appropriate to the location
• Do we have to have the zoom, or is it possible to just have a one 1-2 second one from not too far away into the map location? I think there might even be accessibility things for users who don't like things moving so much with a full globe zoom?
• Is it possible to have a 20 zoom level, as as of now the user wouldn't be able to necessarily orient the location to other surrounding to know where it is without zooming out? Or maybe we add a bit to the padding?

Thanks so much for continuing to crack away at all this!