update docs (11299)

Signed-off-by: Nesterzhou <ester.zhou@huawei.com>

en/device-dev/subsystems/Readme-EN.md

@@ -18,6 +18,7 @@
       - [Viewing Ninja Build Information](subsys-build-reference.md)
       - [HAP Build Guide](subsys-build-gn-hap-compilation-guide.md)
       - [FAQs](subsys-build-FAQ.md)
+- [ArkCompiler Development](subsys-arkcompiler-guide.md)
 - [Distributed Remote Startup](subsys-remote-start.md)
 - Graphics
   - [Graphics Overview](subsys-graphics-overview.md)

en/device-dev/subsystems/subsys-arkcompiler-guide.md

+# ArkCompiler Development
+
+## Introduction
+ArkCompiler is a unified programming platform. Its key components include a compiler, toolchain, and runtime. ArkCompiler supports compilation and running of high-level programming languages on the multi-chip platform and accelerates the running of applications and services on mobile phones, PCs, tablets, TVs, automobiles, and smart wearables.
+
+## Environment Setup
+Ubuntu 18.04 or later is recommended.
+
+1. Install dependent tools.
+   ```shell
+   sudo apt-get update && sudo apt-get install python ruby python3-pip git-lfs gcc-multilib g++-multilib zlib1g-dev libc++1 curl nodejs
+   ```
+2. Install the **repo** tool.
+    ```shell
+    mkdir ~/bin/
+    curl https://gitee.com/oschina/repo/raw/fork_flow/repo-py3 > ~/bin/repo
+    chmod a+x ~/bin/repo
+    export PATH=~/bin:$PATH
+    pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple requests
+    ```
+3. Download source code.
+    ```shell
+    repo init -u https://gitee.com/ark-standalone-build/manifest.git -b master
+    repo sync -c -j8
+    repo forall -c 'git lfs pull'
+    ```
+
+4. Install the compiler and binary tool.
+    ```shell
+    ./prebuilts_download.sh
+    ```
+
+## How to Develop
+
+1. Create the build products **ark_js_vm** and **ts2panda**.
+    ```shell
+    python ark.py x64.release
+    ```
+    - **ark_js_vm**: executable program for running .abc files.
+    - **ts2panda**: tool that converts ArkTS files into ArkCompiler bytecode files.
+
+2. Use **ts2panda** to convert a TypeScript file to an .abc file.
+    ```shell
+    prebuilts/build-tools/common/nodejs/node-v12.18.4-linux-x64/bin/node --expose-gc out/x64.release/clang_x64/obj/arkcompiler/ets_frontend/ts2panda/build/src/index.js helloworld.ts --opt-level 0
+    ```
+    Code snippet of the TypeScript case file **helloworld.ts**:
+    ```JavaScript
+    declare function print(arg:any):string;
+    print("Hello world!");
+    ```
+
+3. Run the generated .abc file.
+    ```shell
+    out/x64.release/clang_x64/arkcompiler/ets_runtime/ark_js_vm helloworld.abc
+    ```
+    .abc file: ArkCompiler bytecode file.
+    
+    The execution output is as follows:
+    ```
+    Hello world!
+    ```
+
+## Running the Test262 Test Suite
+```
+python ark.py x64.release test262
+```
+
+## Build Options
+
+Select a build mode, for example, mode for building a debug version on an x64 platform.
+```
+python ark.py x64.debug
+```
+Obtain help information.
+```
+python ark.py --help
+```