chore(vitest): migrate config from typescript to javascript since this is not a ts project

Author: travi

vitest.config.js

@@ -0,0 +1,14 @@
+import {defineConfig} from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    restoreMocks: true,
+    mockReset: true,
+
+    coverage: {
+      provider: 'v8',
+      include: ['src/**'],
+      exclude: ['src/**/index.js']
+    }
+  }
+});