Holos 4 - 8fbb0499

Add comprehensive unit tests and enhance calculators

Added extensive unit tests for calculators, converters, providers, and services under H.Core.Test. Introduced new calculators (e.g., CarbonInputCalculator, NitrogenInputCalculator) and made significant enhancements and refactoring across carbon, nitrogen, climate, economics, and infrastructure calculators. Updated and added resource files, improved model classes, and fixed various issues to increase test coverage and reliability.