Feat: pptx and xlsx loader (#1118)

* perf: plan tip

* perf: upload size controller

* feat: add image ttl index

* feat: new upload file ux

* remove file

* feat: support read pptx

* feat: support xlsx

* fix: rerank docker flie

packages/service/common/file/read/rawText.ts

@@ -0,0 +1,10 @@
+import { ReadFileByBufferParams, ReadFileResponse } from './type.d';
+
+// 加载源文件内容
+export const readFileRawText = ({ buffer, encoding }: ReadFileByBufferParams): ReadFileResponse => {
+  const content = buffer.toString(encoding);
+
+  return {
+    rawText: content
+  };
+};