doc: add readme

README.en.md

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+<img width="150" height="150" style="float: left; margin: 0 10px 0 0;" alt="AAS icon" src="docs/resources/aas_icon.svg"/>
+
+# ArisuAutoScript
+
+**Blue Archive Automation Script**
+
+**| English | [简体中文](README.md) |**
+
+## Features
+
+The script is still under active development. The following features have been implemented:
+
+- [x] **Cafe** Claim rewards / Interact / Second cafe
+- [x] **Circle** Claim AP
+- [x] **Mailbox** Claim rewards
+- [x] **Tactical Challenge** Claim rewards / Auto battle
+
+_Currently only supports JP server._
+
+## Relative projects
+
+- [AzurLaneAutoScript](https://github.com/LmeSzinc/AzurLaneAutoScript): Azur Lane auto script
+- [StarRailCopilot](https://github.com/LmeSzinc/StarRailCopilot): A bot for Honkai: Star Rail, based on the next
+  generation of ALAS framework.
+
+## Acknowledgements
+
+Thanks to [6bir](https://github.com/6bir) for the icon design.
+
+Thanks to [Alas](https://github.com/LmeSzinc/AzurLaneAutoScript) and [SRC](https://github.com/LmeSzinc/StarRailCopilot)
+for the development framework.