Optimization

[Zubs]

This pull request refactors and improves the Roman numeral utility functions in both the JavaScript (index.js) and TypeScript (src/index.ts) files. The most significant changes include simplifying the logic for validating and converting Roman numerals and improving error handling and documentation.

Functionality and logic improvements:

• Refactored the toRoman function to use a mapping approach for converting numbers to Roman numerals, replacing the previous verbose logic with a more concise and maintainable loop. This also changes error handling from returning Error objects to throwing exceptions for invalid input. [1] [2]
• Improved the isRoman function by replacing the use of forEach with a standard for loop for checking the maximum allowed occurrences of Roman numeral characters, making the logic clearer and ensuring early exit on invalid input. [1] [2]

Documentation and type improvements:

• Fixed typos and clarified the JSDoc comments for the getCount function in both files, improving code readability and developer experience. [1] [2]