minor improvements

[Pooja3894]

• Warning if no data in a polygon
• print out error missing f string: "The geometry_name's tried are: +{geometry_type_list}"
• if the boundary polygon CRS is None set it using CRS

[rosepearson]

• change the assertion in https://github.com/niwa/geoapis/blob/main/src/geoapis/lidar.py#L177 with raising an exception.

Assertions are good but in general used enforce some invariants (eg. a condition that should never be reached if the code is properly used). Here this is more like a test so an exception looks, to me, more appropriate. From Maxime

[rosepearson]

• Ensure that geoapis can handle the case that a multipolgon is passed as a bounding polygon - or at least that a useful error message is returned. This is a problem from the raster module. Not sure about the vector module.