fix(types): fix type error if nuxtIcon property doesn't exist in appConfig

src/module.ts

@@ -5,7 +5,11 @@ import {
   installModule,
 } from '@nuxt/kit'
 
-export interface ModuleOptions {}
+export interface ModuleOptions {
+  size?: string | false
+  class?: string
+  aliases?: { [alias: string]: string }
+}
 
 // Learn how to create a Nuxt module on https://nuxt.com/docs/guide/going-further/modules/
 export default defineNuxtModule<ModuleOptions>({

src/types.d.ts

@@ -0,0 +1,10 @@
+import * as _nuxt_schema from '@nuxt/schema';
+import { ModuleOptions } from './module';
+
+declare module '@nuxt/schema' {
+    interface AppConfig {
+        nuxtIcon?: ModuleOptions
+    }
+}
+
+export default _nuxt_schema.NuxtModule<ModuleOptions>;