fix: wrong import for path in `SimpleKVStore.ts` (#383)

Co-authored-by: Alex Yang <himself65@outlook.com>

.changeset/honest-months-add.md

+---
+"llamaindex": minor
+---
+
+fixing import statement

packages/core/src/storage/kvStore/SimpleKVStore.ts

 import _ from "lodash";
-import * as path from "path";
+import path from "path";
 import { GenericFileSystem, exists } from "../FileSystem";
 import { DEFAULT_COLLECTION, DEFAULT_FS } from "../constants";
 import { BaseKVStore } from "./types";