CI action update. Some example directory refactoring. No code changes. (0.39.15)

examples/ui/tk_testing.fun

@@ -0,0 +1,38 @@
+#!/usr/bin/env fun
+
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2025-12-23
+ */
+
+#include <ui/tk.fun>
+
+print("Testing os_list_dir...")
+files = os_list_dir(".")
+print("Found " + to_string(len(files)) + " files.")
+if len(files) > 0
+  print("First file: " + files[0])
+
+print("Testing tk_bind parsing...")
+// We can't easily test Tk without an X server, but we can see if it crashes.
+// If built with FUN_WITH_TCLTK, it should at least initialize.
+// We use tk_eval to avoid full loop.
+rc = tk_eval("set x 1")
+print("tk_eval rc: " + to_string(rc))
+if rc == 0
+  print("Tcl Result: " + tk_result())
+
+/* Expected output:
+Testing os_list_dir...
+Found 23 files.
+First file: build
+Testing tk_bind parsing...
+tk_eval rc: 0
+Tcl Result: 1
+*/