Release v18.0.3.0.0 - Complete Documentation Overhaul

This major release focuses on code quality and documentation improvements:

� Key Features:
- Comprehensive English documentation for all models, classes, and methods
- Enhanced code structure and readability
- Bug fixes and typo corrections
- Complete technical documentation for developers

� Changes:
- All models now have detailed docstrings with Args, Returns, Raises sections
- Module-level documentation headers added to all Python files
- Business logic explanations for complex methods
- Integration documentation for Odoo systems
- Error handling documentation improvements

� Technical Improvements:
- Fixed _generate_validation_code method typo
- Improved code formatting and syntax
- Better validation and error handling
- Enhanced computed field documentation

� Developer Experience:
- Clear understanding of business workflows
- Easier module extension and customization
- Better integration capabilities with other Odoo modules
- Comprehensive debugging and maintenance guides

This release maintains full backward compatibility while significantly improving code quality and developer experience.