feat: add @nexus-ui registry to public directory (#10067)

apps/v4/public/r/registries.json

@@ -917,6 +917,12 @@
     "url": "https://ui.flexnative.com/r/{name}.json",
     "description": "A collection of customizable UI blocks with interactive live previews"
   },
+  {
+    "name": "@nexus-ui",
+    "homepage": "https://nexus-ui.dev",
+    "url": "https://nexus-ui.dev/r/{name}.json",
+    "description": "Open-source component library of composable, copy-paste primitives for building AI interfaces (chat, streaming, multimodal)"
+  },
   {
     "name": "@sabraman",
     "homepage": "https://sabraman.ru/components",