updated readme (EN)

Signed-off-by: Gloria <wusongqing@huawei.com>

README.md

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+#  Public Repository for API Declaration Files
+
+## Overview
+
+This repository is used to store .d.ts declaration files of JavaScript/TypeScript APIs and API-related tools.
+
+## Directory Structure
+
+```
+├─api
+|  ├─@internal
+│  |  ├─component
+│  |  |  └─ets                 # Declaration file for components in the TypeScript-based declarative development paradigm
+|  |  └─ets 
+|  ├─config                    # JavaScript-based web-like development paradigm
+|  ├─form                      # JavaScript service widget
+|  ├─@ohos.×××.d.ts            # API declaration file
+|  └─@system.×××.d.ts          # Deprecated APIs
+├─build-tools
+   ├─api_check_plugin          # Tool for checking API specifications
+   |  ├─plugin
+   |  ├─src
+   |  └─test
+   └─collect_application_api   # Tool for parsing used APIs
+      └─src
+```
+
+## Repositories Involved
+
+[interface-sdk_js](https://gitee.com/openharmony/interface_sdk-js/tree/master)

README_en.md

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-# API Declaration File Public Repository<a name="US-EN_TOPIC_0000001151209521"></a>
-
--   [Introduction](#section11660541593)
-
-## Introduction<a name="section11660541593"></a>
-
-JavaScript API public repository which is used to submit API d.ts Declaration File.
-