Added some crypto 100% implemented in Fun. (0.11.0)

examples/crc32_demo.fun

@@ -0,0 +1,32 @@
+#!/usr/bin/env fun
+
+/*
+ * This file is part of the Fun programming language.
+ * https://hanez.org/project/fun/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the ISC license.
+ * https://opensource.org/license/isc-license-txt
+ *
+ * Added: 2025-09-29
+ */
+
+// Include the pure Fun CRC32 library
+include "lib/crypt/crc32.fun"
+
+// Create a Class-typed instance to prevent accidental shadowing
+Class c32 = CRC32()
+print(typeof(c32))  // should be "Class"
+
+print("=== CRC32 demo (hex input) ===")
+
+// "" (empty) -> 00000000
+print(c32.crc32_hex(""))
+
+ // "abc" -> 352441c2
+print(c32.crc32_hex("616263"))
+
+// "123456789" -> cbf43926
+print(c32.crc32_hex("313233343536373839"))
+
+print("=== Done ===")