docs: add shared WeChat community QR (same group as ARIS main repo)

Copy `wechat_group.jpg` from the ARIS main repo into `assets/` and add a
"💬 Community" section to both README.md and README_CN.md. Explicitly note
that this is the same WeChat group as the main ARIS repo — one community
covering both the skill workflow and this tutorial collection.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: wanshuiyin

README.md

@@ -137,6 +137,16 @@ Full contribution guide: [**CONTRIBUTING.md**](CONTRIBUTING.md) ([English](CONTR
 
 ---
 
+## 💬 Community
+
+**Shared community with the main [ARIS repo](https://github.com/wanshuiyin/Auto-claude-code-research-in-sleep)** — the same WeChat group covers ARIS skill workflows + this tutorial collection. Join to discuss interview prep, request new cheat-sheet topics, or share corrections / contributions:
+
+<p align="center">
+  <img src="assets/wechat_group.jpg" alt="WeChat Group QR Code (shared with ARIS main repo)" width="300">
+</p>
+
+---
+
 ## License
 
 [MIT](LICENSE) — use, modify, share, fork freely. Hope this helps your job search. 💪

README_CN.md

@@ -137,6 +137,16 @@
 
 ---
 
+## 💬 社区
+
+**与 [ARIS 主仓](https://github.com/wanshuiyin/Auto-claude-code-research-in-sleep) 共享一个社区** —— 同一个微信群既讨论 ARIS skill workflow，也讨论这份秋招 cheat sheet 合集。进群可以讨论面试准备、提新的 cheat sheet 主题需求、或反馈勘误 / 贡献：
+
+<p align="center">
+  <img src="assets/wechat_group.jpg" alt="WeChat 群二维码（与 ARIS 主仓共享）" width="300">
+</p>
+
+---
+
 ## License
 
 [MIT](LICENSE) — 用、改、传、二开都行。希望对正在准备秋招的你有帮助。加油 💪