DEWPython v2.1.0

This release provides comprehensive documentation updates and refinements to DEWPython, a Python implementation of the Deep Earth Water (DEW) model for calculating thermodynamic properties under extreme pressure-temperature conditions.
Key improvements:

• Enhanced documentation with detailed examples and usage instructions
• Clarified pressure and temperature validity ranges for all model components
• Added information about recent applications, particularly for ocean world geochemistry
• Improved descriptions of SUPCRT96 and SUPCRTBL integration
• Updated information on complementary software tools
• Expanded reference section with latest citations