feat: add Coupang search and add-to-cart adapters

Add browser-backed Coupang adapters for search and add-to-cart workflows.
- coupang search: multi-strategy data collection (API/JSON-LD/bootstrap/DOM), structured fields (price, rating, rocket, delivery), pagination and rocket filter support
- coupang add-to-cart: logged-in browser session reuse, stops before checkout
- coupang.ts: comprehensive data normalization layer with badge/rocket/delivery mapping
- browser-tab.ts: withTemporaryTab utility for isolated tab operations
- Unit tests for core normalization functions

Co-authored-by: CodeBBakGoSu <127713112+CodeBBakGoSu@users.noreply.github.com>

README.md

@@ -9,7 +9,7 @@
 [![Node.js Version](https://img.shields.io/node/v/@jackwener/opencli?style=flat-square)](https://nodejs.org)
 [![License](https://img.shields.io/npm/l/@jackwener/opencli?style=flat-square)](./LICENSE)
 
-A CLI tool that turns **any website** into a command-line interface. **57 commands** across **17 sites** — bilibili, zhihu, xiaohongshu, twitter, reddit, xueqiu, github, v2ex, hackernews, bbc, weibo, boss, yahoo-finance, reuters, smzdm, ctrip, youtube — powered by browser session reuse and AI-native discovery.
+A CLI tool that turns **any website** into a command-line interface. **59 commands** across **18 sites** — bilibili, zhihu, xiaohongshu, twitter, reddit, xueqiu, github, v2ex, hackernews, bbc, weibo, boss, yahoo-finance, reuters, smzdm, ctrip, youtube, coupang — powered by browser session reuse and AI-native discovery.
 
 ---
 
@@ -126,6 +126,7 @@ npm install -g @jackwener/opencli@latest
 | **reddit** | `hot` `frontpage` `search` `subreddit` | 🔐 Browser |
 | **weibo** | `hot` | 🔐 Browser |
 | **boss** | `search` | 🔐 Browser |
+| **coupang** | `search` `add-to-cart` | 🔐 Browser |
 | **youtube** | `search` | 🔐 Browser |
 | **yahoo-finance** | `quote` | 🔐 Browser |
 | **reuters** | `search` | 🔐 Browser |