feat: implement tests and coverage reports for KpiCards and scrapeLakes functionality

vite.config.ts

@@ -1,7 +1,13 @@
+/// <reference types="vitest" />
 import { defineConfig } from 'vite'
 import react from '@vitejs/plugin-react'
 
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [react()],
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    setupFiles: './src/test/setup.ts',
+  },
 })