refactor: 重命名SDK为iflow-engine，使用npm包引入第三方引擎

- 将包名从 @fishdingding/bim-engine-sdk 改为 iflow-engine
- 将构建输出文件从 bim-engine-sdk.*.js 改为 iflow-engine.*.js
- 将全局变量从 LyzBimEngineSDK 改为 IflowEngine
- 将第三方引擎SDK从本地引入改为npm包引入 (iflow-engine-base)
- 移除本地 src/engine_base 目录，移至回收站
- 更新所有文档和demo中的引用

docs/SDK使用指南.md

@@ -1,6 +1,6 @@
-# BIM Engine SDK 使用文档
+# iFlow Engine 使用文档
 
-BIM Engine SDK 是一个用于 3D BIM 模型展示的 JavaScript SDK，支持原生 HTML、Vue 2/3 和 React 框架。
+iFlow Engine 是一个用于 3D BIM 模型展示的 JavaScript SDK，支持原生 HTML、Vue 2/3 和 React 框架。
 
 ## 目录
 
@@ -19,19 +19,19 @@ BIM Engine SDK 是一个用于 3D BIM 模型展示的 JavaScript SDK，支持原
 ### NPM 安装（推荐）
 
 ```bash
-npm install @fishdingding/bim-engine-sdk
+npm install iflow-engine
 ```
 
 ### Yarn 安装
 
 ```bash
-yarn add @fishdingding/bim-engine-sdk
+yarn add iflow-engine
 ```
 
 ### PNPM 安装
 
 ```bash
-pnpm add @fishdingding/bim-engine-sdk
+pnpm add iflow-engine
 ```
 
 ### CDN / 本地文件引入
@@ -39,7 +39,7 @@ pnpm add @fishdingding/bim-engine-sdk
 如果不使用包管理器，可以直接下载 JS 文件引入：
 
 ```html
-<script src="./lib/bim-engine-sdk.umd.js"></script>
+<script src="./lib/iflow-engine.umd.js"></script>
 ```
 
 ---
@@ -64,7 +64,7 @@ pnpm add @fishdingding/bim-engine-sdk
     <div id="app"></div>
 
     <script type="module">
-        import { BimEngine } from '@fishdingding/bim-engine-sdk';
+        import { BimEngine } from 'iflow-engine';
 
         // 1. 创建引擎实例
         const engine = new BimEngine('app', {
@@ -101,7 +101,7 @@ pnpm add @fishdingding/bim-engine-sdk
     <meta charset="UTF-8">
     <title>BIM Engine Demo</title>
     <!-- 引入 UMD 版本 -->
-    <script src="https://unpkg.com/@fishdingding/bim-engine-sdk/dist/bim-engine-sdk.umd.js"></script>
+    <script src="https://unpkg.com/iflow-engine/dist/iflow-engine.umd.js"></script>
     <style>
         * { margin: 0; padding: 0; box-sizing: border-box; }
         html, body { width: 100%; height: 100%; overflow: hidden; }
@@ -200,7 +200,7 @@ window.onload = init;
 ### 1. 安装
 
 ```bash
-npm install @fishdingding/bim-engine-sdk
+npm install iflow-engine
 ```
 
 ### 2. 组件封装
@@ -213,7 +213,7 @@ npm install @fishdingding/bim-engine-sdk
 
 <script setup>
 import { ref, onMounted, onBeforeUnmount } from 'vue';
-import { BimEngine } from '@fishdingding/bim-engine-sdk';
+import { BimEngine } from 'iflow-engine';
 
 // Props
 const props = defineProps({
@@ -352,7 +352,7 @@ const stopMeasure = () => viewerRef.value?.deactivateMeasure();
 ### 1. 安装
 
 ```bash
-npm install @fishdingding/bim-engine-sdk
+npm install iflow-engine
 ```
 
 ### 2. 组件封装
@@ -364,7 +364,7 @@ npm install @fishdingding/bim-engine-sdk
 </template>
 
 <script>
-import { BimEngine } from '@fishdingding/bim-engine-sdk';
+import { BimEngine } from 'iflow-engine';
 
 export default {
     name: 'BimViewer',
@@ -500,7 +500,7 @@ export default {
 ### 1. 安装
 
 ```bash
-npm install @fishdingding/bim-engine-sdk
+npm install iflow-engine
 ```
 
 ### 2. Hook 封装
@@ -508,7 +508,7 @@ npm install @fishdingding/bim-engine-sdk
 ```jsx
 // hooks/useBimEngine.js
 import { useEffect, useRef, useState, useCallback } from 'react';
-import { BimEngine } from '@fishdingding/bim-engine-sdk';
+import { BimEngine } from 'iflow-engine';
 
 export function useBimEngine(options = {}) {
     const containerRef = useRef(null);
@@ -697,7 +697,7 @@ export default App;
 #### 构造函数
 
 ```javascript
-import { BimEngine } from '@fishdingding/bim-engine-sdk';
+import { BimEngine } from 'iflow-engine';
 
 new BimEngine(container, options)
 ```
@@ -818,5 +818,5 @@ engine.on('modelLoaded', (data) => {
 
 ## 技术支持
 
-- NPM 包地址：https://www.npmjs.com/package/@fishdingding/bim-engine-sdk
+- NPM 包地址：https://www.npmjs.com/package/iflow-engine
 - 如有问题，请联系技术支持