docs: Add readme

README.md

@@ -1,3 +1,45 @@
 # ZuZu Electron
+> Zawgyi <=> Unicode Converter that lives in your menu bar.
 
-## Web Version
+<img src="./assets/zuzu.gif" alt="zuzu" align="right">
+
+## Install
+- [mac](https://github.com/AungMyoKyaw/zuzu-menubar-app/releases/latest)
+- [window](https://github.com/AungMyoKyaw/zuzu-menubar-app/releases/latest)
+
+## User Guide
+### Toggle ZUZU
+- <kbd>command</kbd>+<kbd>shift</kbd>+<kbd>space</kbd> [mac]
+- <kbd>control</kbd>+<kbd>shift</kbd>+<kbd>space</kbd> [window]
+
+### Convert
+- <kbd>command</kbd>+<kbd>enter</kbd> [mac]
+- <kbd>control</kbd>+<kbd>enter</kbd> [window]
+
+### Open Preference
+- <kbd>command</kbd>+<kbd>,</kbd> [mac]
+- <kbd>control</kbd>+<kbd>,</kbd> [window]
+
+### Close App
+- <kbd>command</kbd>+<kbd>q</kbd> [mac]
+- <kbd>alt</kbd>+<kbd>f4</kbd> [window]
+
+## Development
+```shell
+npm install
+npm start
+```
+
+## Build
+```shell
+npm run build
+```
+
+## Built with
+- Electron
+- React
+- Redux
+- React Router
+
+## License
+[MIT](./LICENSE)