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/electron/preload.ts

@@ -0,0 +1,10 @@
+import { contextBridge, ipcRenderer } from 'electron';
+
+contextBridge.exposeInMainWorld('txadmin', {
+  getKeyStatus: () => ipcRenderer.invoke('key:status'),
+  selectPrivateKey: () => ipcRenderer.invoke('key:select'),
+  request: (route: string, body: unknown) => ipcRenderer.invoke('admin:request', route, body),
+  minimizeWindow: () => ipcRenderer.invoke('window:minimize'),
+  toggleMaximizeWindow: () => ipcRenderer.invoke('window:toggle-maximize'),
+  closeWindow: () => ipcRenderer.invoke('window:close'),
+});