Added very basic XML support using libxml2. (0.35.0)

lib/io/xml.fun

@@ -0,0 +1,39 @@
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2025 Johannes Findeisen
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2025-12-09
+ */
+
+// XML stdlib abstraction wrapping the xml_* VM builtins (libxml2-backed).
+// Minimal API for now: parse, from_file, root, name, text
+
+class XML()
+  // Parse XML text into a document handle (>0) or 0 on error.
+  fun parse(this, text)
+    t = to_string(text)
+    return xml_parse(t)
+
+  // Load XML from a file path; returns document handle (>0) or 0.
+  fun from_file(this, path)
+    p = to_string(path)
+    data = read_file(p)
+    if (len(data) == 0)
+      return 0
+    return xml_parse(data)
+
+  // Get root node handle (>0) or 0.
+  fun root(this, doc)
+    return xml_root(doc)
+
+  // Get node name as string.
+  fun name(this, node)
+    return xml_name(node)
+
+  // Get node concatenated text content as string.
+  fun text(this, node)
+    return xml_text(node)