fix(add): create layers relative to rootDir

Author: danielroe

packages/nuxi/src/utils/templates/layer.ts

@@ -3,7 +3,7 @@ import { resolve } from 'pathe'
 
 const layer: Template = ({ name, nuxtOptions }) => {
   return {
-    path: resolve(nuxtOptions.srcDir, `layers/${name}/nuxt.config.ts`),
+    path: resolve(nuxtOptions.rootDir, `layers/${name}/nuxt.config.ts`),
     contents: `
 export default defineNuxtConfig({})
 `,