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>

backend/src/modules/users/controller.js

@@ -0,0 +1,20 @@
+import { ok, asyncHandler } from '../../utils/http.js';
+import * as service from './service.js';
+
+export const getUsers = asyncHandler(async (req, res) => ok(res, await service.listUsers()));
+export const getRoles = asyncHandler(async (req, res) => ok(res, await service.listRoles()));
+
+export const postUser = asyncHandler(async (req, res) => {
+  const user = await service.createUser(req.body, req.currentUser.id);
+  ok(res, user, 201);
+});
+
+export const putUser = asyncHandler(async (req, res) => {
+  const user = await service.updateUser(Number(req.params.id), req.body, req.currentUser.id);
+  ok(res, user);
+});
+
+export const patchUserActive = asyncHandler(async (req, res) => {
+  const user = await service.setUserActive(Number(req.params.id), !!req.body.isActive, req.currentUser.id);
+  ok(res, user);
+});