Added very basic Tk (Tcl) support using. (0.36.0)

lib/ui/tk.fun

@@ -0,0 +1,36 @@
+#!/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: 2025-12-09
+ */
+
+// Tk stdlib helper wrapping the Tk VM builtins.
+// No raw Tcl is exposed; this class provides a tiny, safe GUI surface.
+
+class TK()
+  // Set the window title
+  fun title(this, title)
+    return tk_title(to_string(title))
+
+  // Create or update a label widget with id and text
+  fun label(this, id, text)
+    return tk_label(to_string(id), to_string(text))
+
+  // Create or update a button widget with id and text
+  fun button(this, id, text)
+    return tk_button(to_string(id), to_string(text))
+
+  // Pack a widget by id
+  fun pack(this, id)
+    return tk_pack(to_string(id))
+
+  // Enter the Tk event loop (blocks until windows are closed)
+  fun loop(this)
+    return tk_loop()