Add BinToHex usage example for SplashKit utilities

public/usage-examples/utilities/bin_to_hex-1-example-oop.cs

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+using SplashKitSDK;
+
+public
+class Program
+{
+public
+    static void Main()
+    {
+        string binaryValue = "111110011010";
+        string hexValue = SplashKit.BinToHex(binaryValue); // SplashKit function
+
+        SplashKit.WriteLine("Binary: " + binaryValue);
+        SplashKit.WriteLine("Hex: " + hexValue);
+    }
+}

public/usage-examples/utilities/bin_to_hex-1-example-top-level.cs

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+using SplashKitSDK;
+
+string binaryValue = "111110011010";
+string hexValue = SplashKit.BinToHex(binaryValue);  // SplashKit function
+
+SplashKit.WriteLine("Binary: " + binaryValue);
+SplashKit.WriteLine("Hex: " + hexValue);

public/usage-examples/utilities/bin_to_hex-1-example.cpp

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+#include "splashkit.h"
+
+int main()
+{
+    string binary_value = "111110011010";
+    string hex_value = bin_to_hex(binary_value); // SplashKit function
+
+    write_line("Binary: " + binary_value);
+    write_line("Hex: " + hex_value);
+
+    return 0;
+}

public/usage-examples/utilities/bin_to_hex-1-example.py

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+from splashkit import write_line, bin_to_hex
+
+binary_value = "111110011010"
+hex_value = bin_to_hex(binary_value)  # SplashKit function
+
+write_line("Binary: " + binary_value)
+write_line("Hex: " + hex_value)

public/usage-examples/utilities/bin_to_hex-1-example.txt

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+This example demonstrates how to convert a binary string into a hexadecimal string
+using SplashKit's built-in bin_to_hex / BinToHex function in Python, C++, and C#.