Refactor percentage value parsing to use a dedicated method for better readability and maintainability.
Add tests to ensure legacy overflow percentages are normalized correctly.
- Add IncoStringParser, IncoIngredientParser, IncoParser, and IncoCompositionParser
- Add ArcadiaBrandMapper, EmployeeMapper, IncoCompositionMapper, IncoShortMapper, and IncoMapper
- Add complete unit test suites for all parsers and mappers