feat(cli): init command

cli/index.mjs

@@ -0,0 +1,14 @@
+import { defineCommand, runMain } from 'citty'
+import init from './commands/init.mjs'
+
+const main = defineCommand({
+  meta: {
+    name: 'nuxtui',
+    description: 'Nuxt UI CLI'
+  },
+  subCommands: {
+    init
+  }
+})
+
+runMain(main)