feat: ATK asset designer release notes (#435)

## Summary by Sourcery

Documentation:
- Add new release notes page describing the redesigned asset designer UI
with a cleaner, more intuitive workflow while retaining all existing
features and security controls.

---------

Co-authored-by: Silke Van den Broeck <[email protected]>

Author: SilVdB

content/release-notes/assets/new-asset-designer-1.png

@@ -0,0 +1,14 @@
+---
+title: "New asset designer"
+author: "SettleMint"
+date: 2025-05-15
+---
+
+## New asset designer in the ATK
+
+![Changelog Image](./assets/new-asset-designer-1.png)
+![Changelog Image](./assets/new-asset-designer-2.png)
+
+We've given the asset designer in our asset tokenization kit a fresh new look! The interface has been completely redesigned to make creating your digital assets smoother and more intuitive than ever. You'll find everything right where you need it, with a clean, modern design that makes the whole process feel effortless.
+
+The new asset designer keeps all the powerful features and security controls you rely on - we've just made them easier to use.