Update command list in README (#2294)

Author: lexie011

README.md

@@ -15,6 +15,10 @@ Preview:
 The extension has a [nightly version](https://marketplace.visualstudio.com/items?itemName=msjsdiag.vscode-react-native-preview) which is released on a daily basis at 9 PM PST on each day that changes occur.
 To avoid conflicts, if both extensions are installed - only stable version will be activated. So to use the preview version it is needed to disable or remove the stable version and reload VS Code.
 
+## Package extension locally
+
+You can not only download React Native Tools in the marketplace, but can also package your extension `.vsix` installation file by yourself locally. Following [this documentation](https://github.com/microsoft/vscode-react-native/blob/master/CONTRIBUTING.md#build-the-project) to package and install your React Native Tools to get the latest updates.
+
 ## About the extension
 
 This VS Code extension provides a development environment for React Native and Expo projects.
@@ -27,6 +31,7 @@ Using this extension, you can **debug your code and quickly run `react-native` o
 # Table of Contents
 
 - [React Native Tools Preview](#react-native-tools-preview)
+- [Package extension locally](#package-extension-locally)
 - [About the extension](#about-the-extension)
 - [Getting started](#getting-started)
 - [React Native commands in the Command Palette](#react-native-commands-in-the-command-palette)
@@ -133,6 +138,11 @@ The full list of commands is:
 | Expo prebuild                                 | `reactNative.expoPrebuild`            | Create the android and ios directories for running your React code                                                                                                                                                                         |
 | Expo prebuild cleanup                         | `reactNative.expoPrebuildClean`       | Clean directories generated by prebuild                                                                                                                                                                                                    |
 | Reopen QR Code in Expo                        | `reactNative.reopenQRCode`            | Reopen expo generated QR code in webview                                                                                                                                                                                                   |
+| Enable Hermes                                 | `reactNative.hermesEnable`            | Use hermes as JavaScript engine for RN project                                                                                                                                                                                             |
+| Enable & Disable Expo Hermes                  | `reactNative.expoHermesEnable`        | Use hermes or jsc as JavaScript engine for expo project                                                                                                                                                                                    |
+| Open expo upgrade helper in web page          | `reactNative.openExpoUpgradeHelper`   | Open expo upgrade helper in web browser                                                                                                                                                                                                    |
+| Kill Port                                     | `reactNative.killPort`                | Kill the process running on a specific port                                                                                                                                                                                                |
+| Set React Native New Architecture             | `reactNative.setNewArch`              | Enable or disable the new architecture settings in RN projects                                                                                                                                                                             |
 
 ## Using commands in VS Code tasks