Refactored the PCRE2 extension plus adding some regex examples using this extension. (0.41.7)

examples/extensions/pcre2/pcre2_lib_test.fun

@@ -0,0 +1,36 @@
+#!/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: 2026-05-07
+ */
+
+// Example: Using stdlib PCRE2 class to run a simple test
+// Requires building Fun with -DFUN_WITH_PCRE2=ON
+
+#include <regex/pcre2.fun>
+
+rx = PCRE2()
+
+pattern = "^hello$"
+text = "Hello"  // mismatches unless case-insensitive is set
+
+// Use case-insensitive flag from the class helper
+flags = rx.i()
+
+print("pcre2_lib_test example:")
+print(rx.test(pattern, text, flags))  // prints 1 on match, 0 otherwise
+
+/* Expected output:
+pcre2_lib_test example:
+foo-123
+4
+11
+2
+*/