🔧 chore(package): 重命名包名称

- 将包名称从"@stt-demo/stt-sdk-core"修改为"d8d-stt-sdk-core"以符合新的命名规范

packages/stt-sdk-core/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@stt-demo/stt-sdk-core",
+  "name": "d8d-stt-sdk-core",
   "version": "1.0.0",
   "description": "STT SDK Core - 语音转文字功能的核心TypeScript SDK",
   "license": "MIT",