Preparation for release v2025.2 (Zonemaster-GUI)

Changes

@@ -1,5 +1,30 @@
 Release history for Zonemaster component Zonemaster-GUI
 
+v5.0.0 2025-12-17 (part of Zonemaster v2025.2 release)
+
+ [Release information]
+ - The GUI in this release has been completely rewritten. The changes
+   primarily focused on the underlying technologies, while the look and
+   feel remains only slightly altered due to various accessibility improvements.
+   From this version on, Zonemaster-GUI supports complete customization of the
+   GUI. You can find more information and a how-to in the documentation.
+
+ [Breaking changes]
+ - The GUI API has changed. It has no longer support for starting a
+   test directly from the URL. You will find more information in the
+   documentation on using the GUI.
+ - Configuration done in "app.config.json" for Zonemaster-GUI, which was
+   run-time configuration, needs to be migrated. Most of that configuration
+   has now become build-time configuration. See documents related to 
+   configuring the GUI.
+
+ [Features]
+ - Rewritten GUI (#511, #514, #516, #517, #519, #520, #521, #523, #526)
+
+ [Fixes]
+ - Ported and updated translation of messages and FAQ for the new GUI
+   (#502, #503, #505, #506, #507, #508, #518)
+
 
 v4.4.0 2025-03-04 (part of Zonemaster v2024.2.1 release)