feat(GeomUtil): add geometry module with point_in_polygon utility

[wpbonelli]

• add GeomUtilModule with point_in_polygon() function
• unit test rectangular cell interior/exterior and edge cases (vertices/faces)
• ported from Javascript solution https://stackoverflow.com/a/63436180/6514033
• for use by PRT to check particle release point coordinates with cell IDs — boundary points are included
• accepts one point, could be reimplemented to support arrays like flopy but not yet needed and approach would need modification to include edge cases I think