feat: add new interfaces, services, and utilities for API integration

refactor: reorganize type definitions and improve type safety

build: add lodash and @types/lodash as dependencies

chore: update tsconfig and vite config for path aliases

style: improve code organization and add documentation comments

fix: correct type usage in LanguageSwitcher component

perf: implement snackbar provider for global notifications

test: add new test interfaces and utility functions

ci: update pnpm-lock.yaml with new dependencies

vite.config.ts

@@ -1,7 +1,13 @@
 import { defineConfig } from 'vite'
 import react from '@vitejs/plugin-react'
+import path from 'path'
 
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [react()],
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './src'),
+    },
+  },
 })