new grid: 'prov_lombardia'

[PackedC]

A grid for the region of Lombardy divided into provinces

[[Note: To help streamline the process of adding this grid, please replace this text with an image of a map for the region for reference. Also, please check the ISO_3166-2 (https://en.wikipedia.org/wiki/ISO_3166-2) codes if your grid uses countries or states/provinces. Finally, if you can provide an example of your grid in action with a data set and sample code, that would be great but is not required.]]

Grid data:

"row","col","code","name"
1,3,"SO","Sondrio"
2,4,"BG","Bergamo"
2,5,"BS","Brescia"
2,3,"LC","Lecco"
2,2,"CO","Como"
2,1,"VA","Varese"
3,2,"MI","Milano"
3,4,"CR","Cremona"
3,3,"MB","MonzaBrianza"
4,1,"PV","Pavia"
4,5,"MN","Mantova"
4,2,"LO","Lodi"