fix(emulators): do not crash without firebase.json file

Author: posva

packages/nuxt/src/module/emulators.ts

@@ -1,4 +1,4 @@
-import { readFile, stat } from 'node:fs/promises'
+import { readFile, stat, access, constants } from 'node:fs/promises'
 import stripJsonComments from 'strip-json-comments'
 import type { ConsolaInstance } from 'consola'
 import type { VueFireNuxtModuleOptions } from './options'
@@ -18,6 +18,11 @@ export async function willUseEmulators(
     return null
   }
 
+  // return true if the file doesn't exist instead of throwing
+  if (await access(firebaseJsonPath, constants.F_OK).catch(() => true)) {
+    return null
+  }
+
   const fileStats = await stat(firebaseJsonPath)
   if (!fileStats.isFile()) {
     return null