refactor: rename DTree to DValue

site/doc/pages/zip_list.txt

@@ -1,16 +1,16 @@
 :sig
-DTree zip_list(String zip_file_name)
+DValue zip_list(String zip_file_name)
 
 :params
 zip_file_name : path to the ZIP archive to inspect
-return value : DTree containing archive metadata and an `entries` array
+return value : DValue containing archive metadata and an `entries` array
 
 :see
 >sys
 zip_create
 zip_read
 zip_extract
-DTree
+DValue
 
 :content
 Reads the central directory from `zip_file_name` and returns structured metadata.
@@ -33,6 +33,6 @@ Each entry contains:
 Example:
 
 ```uce
-DTree info = zip_list("/tmp/example.zip");
+DValue info = zip_list("/tmp/example.zip");
 print(json_encode(info));
 ```