feat: add TypeScript definitions and utility functions for date formatting

- Created a global TypeScript declaration for the txadmin interface on the Window object.
- Implemented date formatting utilities using date-fns with Spanish locale support.
- Added TypeScript configuration files for app, Electron, and Node environments.
- Set up Vite configuration for React application.

txadmin/src/main.tsx

@@ -0,0 +1,10 @@
+import React from 'react'
+import ReactDOM from 'react-dom/client'
+import App from './App.tsx'
+import './index.css'
+
+ReactDOM.createRoot(document.getElementById('root')!).render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+)