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

vite.config.ts

@@ -11,9 +11,8 @@ export default defineConfig(() => {
         include: ['src'],
         exclude: [
           'src/**/*.es.js',
-          'src/bim-engine-sdk.es.js',
           '**/*.es.js'
-        ], // 排除第三方 SDK 文件，避免类型分析错误
+        ],
         rollupTypes: true,
         logLevel: 'warn', // 只显示警告和错误
       }),
@@ -27,8 +26,8 @@ export default defineConfig(() => {
     build: {
       lib: {
         entry: resolve(__dirname, 'src/index.ts'),
-        name: 'LyzBimEngineSDK',
-        fileName: (format) => `bim-engine-sdk.${format}.js`,
+        name: 'IflowEngine',
+        fileName: (format) => `iflow-engine.${format}.js`,
       },
       rollupOptions: {
         output: {