fix: tests -> use vite plugin in tests as well

vitest.config.js

@@ -0,0 +1,20 @@
+import { defineConfig } from 'vitest/config';
+import bundleAudioWorkletPlugin from './packages/vite-plugin-bundle-audioworklet/vite-plugin-bundle-audioworklet';
+
+/// <reference types="vitest" />
+export default defineConfig({
+  plugins: [bundleAudioWorkletPlugin()],
+  test: {
+    reporters: 'verbose',
+    isolate: false,
+    silent: true,
+    exclude: [
+      '**/node_modules/**',
+      '**/dist/**',
+      '**/cypress/**',
+      '**/.{idea,git,cache,output,temp}/**',
+      '**/{karma,rollup,webpack,vite,vitest,jest,ava,babel,nyc,cypress}.config.*',
+      '**/shared.test.mjs',
+    ],
+  },
+});