feat: implement integer to Roman numeral conversion (C++)

[Ang-m4]

Description

This pull request introduces a new solution for converting integers to Roman numerals in the IntegerToRoman.cpp file. The implementation defines a Solution class with a method intToRoman that handles the conversion using a combination of digit extraction and mapping Roman numeral equivalents.

Key changes:

• New Solution class and intToRoman method:
  • Added a Solution class with a public method intToRoman(int num) to convert an integer to its Roman numeral representation.
  • Utilized a map to store Roman numeral equivalents for specific values and a vector to define the positional powers (1000, 100, 10, 1) for processing each digit.
  • Implemented logic to handle special cases (e.g., 4 as "IV" and 9 as "IX") and standard Roman numeral construction by appending the appropriate characters.

[Copilot]

Pull Request Overview

This PR implements a new solution for converting integers to Roman numerals in C++ by introducing a new Solution class with an intToRoman method.

• Introduces the Solution class and its intToRoman method.
• Uses STL containers (vector and map) to handle digit extraction and numeral mapping.
• Implements special-case handling for values 4 and 9 in Roman numeral conversion.