feat: unify settings (#3128)

packages/lib/vitest.config.ts

@@ -1,6 +1,9 @@
+import macrosPlugin from 'vite-plugin-babel-macros';
 import { defineConfig } from 'vitest/config';
 
 export default defineConfig({
+  // Transform lingui macros (e.g. `msg`) used by the code under test.
+  plugins: [macrosPlugin()],
   test: {
     include: ['**/*.test.ts'],
   },