feat: allow class-based calibration definitions from hgvs_nt and hgvs_pro

- Allow class-based calibration to be defined via hgvs strings
- Introduced new test CSV files for calibration classes based on HGVS nucleotide, HGVS protein, and URN.
- Enhanced test coverage for score calibration creation and updating, including scenarios for decoding errors and validation errors.
- Refactored tests to utilize parameterization for different calibration class files.
- Added validation checks for index column selection in calibration dataframes.
- Improved error messages for missing or invalid calibration classes.

Author: bencap