fix(oxlint): ignore fixtures dir for vitest

Author: camc314

apps/oxlint/vitest.config.ts

@@ -1,3 +1,7 @@
 import { defineConfig } from 'vitest/config';
 
-export default defineConfig({});
+export default defineConfig({
+  test: {
+    exclude: ['fixtures/**'],
+  },
+});