chore: use reference `electron-env.d.ts` type

electron/electron-env.d.ts

@@ -1,7 +1 @@
-declare namespace NodeJS {
+/// <reference types="vite-plugin-electron/electron-env" />
-  interface ProcessEnv {
-    NODE_ENV: 'development' | 'production'
-    readonly VITE_DEV_SERVER_HOST: string
-    readonly VITE_DEV_SERVER_PORT: string
-  }
-}