Lot of example directory structure refactoring. (0.39.9).

examples/strings/base64_demo.fun

@@ -0,0 +1,51 @@
+#!/usr/bin/env fun
+
+/*
+  * This file is part of the Fun programming language.
+  * https://fun-lang.xyz/
+  *
+  * Copyright 2026 Johannes Findeisen <you@hanez.org>
+  * Licensed under the terms of the Apache-2.0 license.
+  * https://opensource.org/license/apache-2-0
+  *
+  * Added: 2026-01-13
+  */
+
+/*
+  * Base64 usage demo (RFC 4648, standard alphabet)
+  *
+  * Run without installing:
+  *   FUN_LIB_DIR="$(pwd)/lib" ./build/fun examples/strings/base64_demo.fun
+  */
+
+#include <encoding/base64.fun>
+
+  print("=== Base64 demo ===")
+
+// Bytes for the ASCII string "Hello"
+bytes = [0x48, 0x65, 0x6c, 0x6c, 0x6f]
+
+// Encode bytes -> Base64 string
+b64 = b64_encode_bytes(bytes)
+print("b64(Hello) = " + b64)            // Expected: SGVsbG8=
+
+// Decode Base64 -> bytes array (uncomment to try)
+// decoded = b64_decode_to_bytes(b64)
+// // Build a comma-separated list of byte values as strings
+// parts = []
+// for i in range(0, len(decoded))
+//   push(parts, to_string(decoded[i]))
+// print("bytes = " + join(parts, ","))  // Expected: 72,101,108,108,111
+
+// Another example: padding with '='
+bytes2 = [0x46, 0x75, 0x6e]  // "Fun"
+print("b64(Fun) = " + b64_encode_bytes(bytes2))  // Expected: RnVu
+
+print("=== done ===")
+
+/* Expected output:
+=== Base64 demo ===
+b64(Hello) = SGVsbG8=
+b64(Fun) = RnVu
+=== done ===
+*/