Improve translation quality for C# to C++ transformer

[konard]

Summary

This pull request significantly improves the C# to C++ translation quality by addressing several key transformation issues identified in issue #16.

Key Improvements

• Boolean type transformation: Boolean → bool
• Input/Output improvements:
  • Console.ReadLine() → std::getline(std::cin, variable)
  • Console.WriteLine(variable) → std::cout << variable << std::endl
  • int.Parse(value) → std::stoi(value)
• Header includes: using System; → #include <iostream> + #include <string>

Example Transformation

Before:

using System;
class Program {
    public static Boolean func(int x1, int x2, int y1, int y2) {
        Boolean first = true;
        if(x1*x1 + y1*y1 > x2*x2 + y2*y2) {
            first = false;
        }
        return first;
    }
    
    static void Main(string[] args) {
        string line = Console.ReadLine();
        int number = int.Parse(line);
        Console.WriteLine(number);
    }
}

After:

#include <iostream>
#include <string>

class Program {
    public: static bool func(std::int32_t x1, std::int32_t x2, std::int32_t y1, std::int32_t y2) {
        bool first = true;
        if(x1*x1 + y1*y1 > x2*x2 + y2*y2) {
            first = false;
        }
        return first;
    }
    
    public: static void Main(std::string args[]) {
        std::string line = 0;
        std::getline(std::cin, line);
        std::int32_t number = std::stoi(line);
        std::cout << number << std::endl;
    }
};

Test Plan

• All existing tests pass
• Added comprehensive test cases for Boolean type transformations
• Added test cases for I/O transformations
• Verified backward compatibility with existing transformations

🤖 Generated with Claude Code

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Resolves #16