Add README.md for Android client project

Author: argraur

README.md

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+[![License: Apache-2.0](https://img.shields.io/badge/License-Apache%202.0-yellow.svg)](http://www.apache.org/licenses/LICENSE-2.0)
+[![Android CI](https://github.com/Polyhoot/android/actions/workflows/android.yml/badge.svg)](https://github.com/Polyhoot/android/actions/workflows/android.yml)
+# **Polyhoot Android client**
+
+_A light-weight Android client for Polyhoot game. Written in **Kotlin** and made with **Material Design 3** and Android 12 **Dynamic Colors support**._
+
+## _Screenshots_
+
+<img src="https://i.imgur.com/P0IIMis.png" width="200"> <img src="https://i.imgur.com/81TD4Ce.png" width="200">
+<img src="https://i.imgur.com/eJCWVSk.png" width="200">
+<img src="https://i.imgur.com/hHzFFGz.png" width="200">
+
+## _Build Artifacts_
+
+You can download **latest debug package** of the app from _GitHub Action Android CI workflow_ [**here**](https://github.com/Polyhoot/android/actions). Open latest successful action and download zipped APK file from the **Artifacts** section.
+
+## _Getting Started_
+
+These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.
+
+### _Prerequisites_
+
+* Java Development Kit 17
+
+### _Cloning_
+
+```
+git clone https://github.com/polyhoot/android -b master
+```
+
+### _Building_
+
+Linux & macOS:
+```
+./gradlew build assembleDebug
+```
+
+Windows:
+```
+.\gradlew.bat build assembleDebug
+```
+
+### _Running on device_
+
+Linux & macOS:
+```
+./gradlew build installDebug
+```
+
+Windows:
+```
+.\gradlew.bat build installDebug
+```
+
+## _Built with_
+
+* [Android Studio](https://developer.android.com/studio) - Official Android IDE by Google & JetBrains
+* [Gradle](https://github.com/gradle/gradle) - Build automation tool
+* [Kotlin](https://kotlinlang.org/) - Official programming language for native Android apps
+* [Google Material Design 3 Components](https://m3.material.io/) - New default design language for Android 12+
+* [OkHttp](https://square.github.io/okhttp) - An HTTP client for handling WebSocket sessions
+
+## _License_
+
+This project is licensed under the Apache License 2.0 - see the [LICENSE](LICENSE) file for details.