Bump package version to 15.0.0

Update __version__ in src/radarsimpy/__init__.py from 14.2.0 to 15.0.0 to reflect the new release.

Author: rookiepeng

src/radarsimpy/__init__.py

@@ -64,7 +64,7 @@
 from . import mesh_kit
 
 # Package metadata
-__version__ = "14.2.0"
+__version__ = "15.0.0"
 __author__ = "RadarSimX"
 __email__ = "info@radarsimx.com"
 __url__ = "https://radarsimx.com"