chore(docs): move from example

docs/nuxt.config.ts

@@ -0,0 +1,12 @@
+import { defineNuxtConfig } from 'nuxt3'
+
+// https://v3.nuxtjs.org/docs/directory-structure/nuxt.config
+export default defineNuxtConfig({
+  buildModules: [
+    '../src'
+  ],
+  ui: {
+    primary: 'blue',
+    prefix: 'u'
+  }
+})