chore: estructura inicial del MVP

Backend (Express + MariaDB) y frontend (React + Vite, identidad Fluent/Windows) con el
nucleo funcional: seguridad, organizacion, proyectos, actividades, subtareas, dependencias,
dashboard, calendario, gantt, comentarios, adjuntos, notificaciones in-app y catalogos.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/src/services/departments.js

@@ -0,0 +1,6 @@
+import { api } from './api.js';
+
+export const listDepartments = () => api.get('/departments');
+export const createDepartment = (data) => api.post('/departments', data);
+export const updateDepartment = (id, data) => api.put(`/departments/${id}`, data);
+export const deleteDepartment = (id) => api.delete(`/departments/${id}`);