fix(kit): resolve relative module paths when installing (#20896)

packages/kit/src/module/install.ts

@@ -1,6 +1,6 @@
 import { lstatSync } from 'node:fs'
 import type { Nuxt, NuxtModule } from '@nuxt/schema'
-import { dirname, isAbsolute, normalize } from 'pathe'
+import { dirname, isAbsolute, normalize, resolve } from 'pathe'
 import { isNuxt2 } from '../compatibility'
 import { useNuxt } from '../context'
 import { requireModule } from '../internal/cjs'
@@ -53,7 +53,11 @@ async function normalizeModule (nuxtModule: string | NuxtModule, inlineOptions?:
 
   // Import if input is string
   if (typeof nuxtModule === 'string') {
-    const src = normalize(resolveAlias(nuxtModule))
+    let src = resolveAlias(nuxtModule)
+    if (src.match(/^\.{1,2}\//)) {
+      src = resolve(nuxt.options.rootDir, src)
+    }
+    src = normalize(src)
     try {
       // Prefer ESM resolution if possible
       nuxtModule = await importModule(src, nuxt.options.modulesDir).catch(() => null) ?? requireModule(src, { paths: nuxt.options.modulesDir })

test/fixtures/basic/modules/test/index.ts

@@ -0,0 +1,7 @@
+import { defineNuxtModule } from 'nuxt/kit'
+
+export default defineNuxtModule({
+  meta: {
+    name: 'test'
+  }
+})

test/fixtures/basic/nuxt.config.ts

@@ -80,6 +80,7 @@ export default defineNuxtConfig({
     }
   },
   modules: [
+    './modules/test/index',
     [
       '~/modules/example',
       {