main: 用户管理和会话功能初始实现

- 添加用户管理功能的测试，包括创建、更新、停用、激活用户及用户登录 JWT 测试
- 提供用户管理相关的请求验证类与控制器
- 引入 CORS 配置信息，支持跨域请求
- 添加数据库播种器以便创建根用户
- 配置 API 默认使用 JWT 认证
- 添加聊天会话和消息的模型、迁移文件及关联功能

routes/api.php

@@ -0,0 +1,27 @@
+<?php
+
+use App\Http\Controllers\AuthController;
+use App\Http\Controllers\ChatSessionController;
+use App\Http\Controllers\UserController;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Route;
+
+Route::get('/health', fn () => ['status' => 'ok']);
+
+Route::post('/login', [AuthController::class, 'login']);
+
+Route::middleware('auth.jwt')->group(function () {
+    Route::get('/me', function (Request $request) {
+        return $request->user();
+    });
+
+    Route::get('/users', [UserController::class, 'index']);
+    Route::post('/users', [UserController::class, 'store']);
+    Route::put('/users/{user}', [UserController::class, 'update']);
+    Route::post('/users/{user}/deactivate', [UserController::class, 'deactivate']);
+    Route::post('/users/{user}/activate', [UserController::class, 'activate']);
+
+    Route::post('/sessions', [ChatSessionController::class, 'store']);
+    Route::post('/sessions/{session_id}/messages', [ChatSessionController::class, 'append']);
+    Route::get('/sessions/{session_id}/messages', [ChatSessionController::class, 'listMessages']);
+});

routes/web.php

@@ -2,6 +2,4 @@
 
 use Illuminate\Support\Facades\Route;
 
-Route::get('/', function () {
-    return view('welcome');
-});
+Route::get('/', fn () => response()->json(['message' => 'ARS API', 'docs' => '/api']));