refactor(spectrum): centralize spectrum argument validation with SpectralArguments dataclass

- Introduce new SpectralArguments dataclass for consistent spectrum parameter handling
- Replace scattered argument validation with centralized check_spectrum_arguments function
- Update function signatures across calculate_nlm and estimate_ir_csd to use new structure
- Extract spectrum parameters into dedicated defaults.yaml configuration
- Add from_kwargs utility for flexible dataclass instantiation from kwargs

This refactoring improves maintainability by consolidating spectrum analysis configuration and removing duplicate validation logic throughout the codebase.