Review of Helper Function for PyObjects and Longitude/Latitude Integration in Results object

[vivekag7]

The Results object in Sleipnir now includes longitude and latitude. However, this update caused errors in some Huginn tests, such as the Halfar solution, due to the absence of these new fields in these specific tests. To resolve this, a helper function was implemented to convert unavailable field values to a float value of 0.

This workaround is something we would like to avoid, so further inspection is needed in both Huginn and Sleipnir

[JordiBolibar]

@facusapienza21 @albangossard We should double check how the new coordinates in pure Julia affect the coordinates added in Results objects and the plotting functions.