Add Base64 Decode usage example for SplashKit utilities

public/usage-examples/utilities/base64_decode-1-example-oop.cs

@@ -0,0 +1,16 @@
+using SplashKitSDK;
+
+public class Program
+{
+    public static void Main()
+    {
+        string encoded = "SGVsbG8gU3BsYXNoS2l0";
+
+        // Decode a Base64 string back to plain text
+        string decoded = SplashKit.Base64Decode(encoded);
+
+        // Print the Base64 input and decoded output
+        SplashKit.WriteLine("Base64: " + encoded);
+        SplashKit.WriteLine("Decoded: " + decoded);
+    }
+}

public/usage-examples/utilities/base64_decode-1-example-top-levelcs

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+using SplashKitSDK;
+
+string encoded = "SGVsbG8gU3BsYXNoS2l0";
+
+// Decode a Base64 string back to plain text
+string decoded = SplashKit.Base64Decode(encoded);
+
+// Print the Base64 input and decoded result
+SplashKit.WriteLine("Base64: " + encoded);
+SplashKit.WriteLine("Decoded: " + decoded);

public/usage-examples/utilities/base64_decode-1-example.cpp

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+#include "splashkit.h"
+
+int main()
+{
+    string encoded = "SGVsbG8gU3BsYXNoS2l0";
+
+    // Decode a Base64 string back to plain text
+    string decoded = base64_decode(encoded);
+
+    // Print the Base64 input and the decoded output
+    write_line("Base64: " + encoded);
+    write_line("Decoded: " + decoded);
+
+    return 0;
+}

public/usage-examples/utilities/base64_decode-1-example.py

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+from splashkit import *
+
+encoded = "SGVsbG8gU3BsYXNoS2l0"
+
+# Decode a Base64 string back to plain text
+decoded = base64_decode(encoded)
+
+# Print the Base64 input and decoded result
+write_line("Base64: " + encoded)
+write_line("Decoded: " + decoded)

public/usage-examples/utilities/base64_decode-1-example.txt

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+This example demonstrates how to use the base64_decode function in SplashKit.
+
+The program takes a Base64-encoded string (e.g. "SGVsbG8gU3BsYXNoS2l0")
+and decodes it back into its original plain text ("Hello SplashKit").
+
+This is useful when converting serialized or encoded data back into a readable format.