Added basic local includes relative to $PWD and includes for files located at /usr/lib/fun.

examples/include_local.fun

@@ -0,0 +1,29 @@
+#!/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
+ */
+
+// To test this you need to go to ./examples/ and test includes running ../build/fun include_local.fun
+// Local includes are always relative from the $PWD.
+
+// Demonstrates local include:
+// This resolves relative to the current working directory where 'fun' is executed.
+#include "include_local_util.fun"
+
+print("== include local demo ==")
+greet("Fun")
+
+number a = 2
+number b = 3
+print("sum(" + to_string(a) + ", " + to_string(b) + ") = " + to_string(sum(a, b)))
+
+// Tip:
+// To include from the system library directory (/usr/lib/fun), use angle brackets:
+//   #include <some_lib.fun>
+