Update predetermined info handling

[JHogenboom]

This pull request introduces version 1.0.3 of the vantage6-strongaya-general library. The main focus of this update is to add a new utility function, convert_to_json_serialisable, which ensures that outputs containing NumPy and Pandas types are properly converted for JSON serialisation. Additionally, all relevant documentation and version references have been updated to reflect the new version, and some minor improvements and clarifications were made to error messages and docstrings.

Key changes:

New Feature

• Added the convert_to_json_serialisable function to convert NumPy and Pandas types to native Python types for JSON serialisation, and integrated it into the statistics calculation pipeline to ensure outputs are JSON-serializable. [1] [2] [3] [4]

Version and Documentation Updates

• Updated version references from 1.0.2 to 1.0.3 in pyproject.toml, __init__.py, and all relevant documentation and install instructions in README.md. [1] [2] [3] [4] [5] [6]

Minor Improvements

• Improved error messages and docstrings for better clarity and consistency in the miscellaneous.py module. [1] [2] [3] [4] [5]
• Added missing import for numpy as np to support the new utility function.