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/utils/formatters.ts

@@ -0,0 +1,18 @@
+import { format, isValid, parseISO } from 'date-fns';
+import { es } from 'date-fns/locale';
+
+const parseDate = (value?: string) => {
+  if (!value) return null;
+  const parsedDate = parseISO(value);
+  return isValid(parsedDate) ? parsedDate : null;
+};
+
+export const formatDate = (value?: string) => {
+  const parsedDate = parseDate(value);
+  return parsedDate ? format(parsedDate, 'dd MMM yyyy', { locale: es }) : value || '-';
+};
+
+export const formatDateTime = (value?: string) => {
+  const parsedDate = parseDate(value);
+  return parsedDate ? format(parsedDate, "dd MMM yyyy, HH:mm 'hs'", { locale: es }) : value || '-';
+};