chore: add changeset for package rename

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: deepracticexc

.changeset/rename-packages.md

@@ -0,0 +1,12 @@
+---
+"@uix-ai/react": patch
+"@uix-ai/tokens": patch
+"@uix-ai/core": patch
+"@uix-ai/stream": patch
+"@uix-ai/agent": patch
+"@uix-ai/adapter-vercel": patch
+"@uix-ai/adapter-agui": patch
+"@uix-ai/adapter-a2ui": patch
+---
+
+Rename packages: @uix-ai/lucid-react → @uix-ai/react, @uix-ai/lucid-tokens → @uix-ai/tokens