Feat: Update docs

- 重构文档结构
- 更新文档内容
- 制定roadmap
- 提供中/EN 双语文档

docs/guides/faq.en.md

@@ -0,0 +1,25 @@
+# Frequently Asked Questions
+
+## Binance Position Mode Error (code=-4061)
+
+**Error Message**: `Order's position side does not match user's setting`
+
+**Cause**: The system requires Hedge Mode (dual position), but your Binance account is set to One-way Mode.
+
+### Solution
+
+1. Login to [Binance Futures Trading Platform](https://www.binance.com/en/futures/BTCUSDT)
+
+2. Click **⚙️ Preferences** in the top right corner
+
+3. Select **Position Mode**
+
+4. Switch to **Hedge Mode** (Dual Position)
+
+5. Confirm the change
+
+**Note**: You must close all open positions before switching modes.
+
+---
+
+For more issues, check [GitHub Issues](https://github.com/tinkle-community/nofx/issues)