[ENH] Update package version and development status

The gempy_engine package version has been updated to 2024.1.2. Additionally, the development status in setup.py has been changed from 'Stable' to 'Production/Stable', reflecting the product's readiness for large-scale use.

Author: Leguark

setup.py

@@ -41,7 +41,7 @@ def read_requirements(file_name):
     long_description_content_type='text/markdown',
     keywords=['geology', '3-D modeling', 'structural geology', 'uncertainty'],
     classifiers=[
-        "Development Status :: 5 - Stable",
+        "Development Status :: 5 - Production/Stable",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: European Union Public Licence 1.2 (EUPL 1.2)",
         "Operating System :: OS Independent",