Updated the JSON data structure for better readability and added more comprehensive output formatting in the main function. Utilized a single 'output' string to accumulate messages, improving code readability and efficiency.
Corrected the indentation of the Float32 field in the JSONType struct. This change improves code readability and maintains consistent formatting throughout the documentation.
Expand the README to include license information, badges, and detailed documentation. Also provide example usage of the `niljson` package to help users understand how to integrate and use nullable JSON fields in their Go applications.