Runtime cast failed on `__geo_interface__` input

[kylebarron]

This line appears to be failing:

lonboard/lonboard/_viz.py

Line 197 in 015672d

data = cast(GeoInterfaceProtocol, data)

GeoInterfaceProtocol is only defined when TYPE_CHECKING is defined, so maybe we should only cast within an if TYPE_CHECKING block?

We should add a test for this with a shapely geom too.