✨ New Features

• This release modifies cart2earth() for converting local Cartesian displacements (x, y in km) to latitude/longitude offsets.
• Implemented great-circle distance and bearing calculations using Earth’s mean radius.
• Improved numerical stability and quadrant handling with math.atan2().

🐛 Fixes

• Fixed incorrect azimuth computation for negative x or y values.
• Corrected handling of (0,0) displacements to prevent ZeroDivisionError.

Full Changelog: v.1.2.2...v.1.2.3