docs: add supported exchanges table and API/wallet setup guides

- Add supported exchanges table to EN, ZH-CN, JA, KO READMEs
- CEX: Binance (supported), OKX (coming soon), Bybit (coming soon)
- Perp-DEX: Hyperliquid (supported), Aster DEX (supported)
- Include referral links with fee discounts for all exchanges
- Remove What's New sections from all READMEs
- Create Binance API setup guide
- Create Hyperliquid agent wallet setup guide
- Create Aster DEX API wallet setup guide

docs/getting-started/binance-api.md

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+# Binance API Setup Guide
+
+This guide explains how to create and configure Binance API keys for use with NOFX.
+
+## Create API Key
+
+1. Log in to your [Binance account](https://www.binance.com)
+2. Go to **Account** → **API Management**
+3. Click **Create API**
+4. Select **System Generated** API key type
+5. Complete 2FA verification
+6. Name your API key (e.g., "NOFX Trading")
+
+## Configure API Permissions
+
+Enable the following permissions:
+
+- ✅ **Enable Reading** - Required
+- ✅ **Enable Futures** - Required for trading
+- ❌ **Enable Withdrawals** - Keep disabled for security
+
+## IP Whitelist (Recommended)
+
+For enhanced security:
+
+1. Click **Edit restrictions**
+2. Select **Restrict access to trusted IPs only**
+3. Add your server's IP address
+4. Save changes
+
+## Save Your Keys
+
+After creation, you'll see:
+- **API Key**: `xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx`
+- **Secret Key**: `xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx`
+
+⚠️ **Important**: Save the Secret Key immediately - it's only shown once!
+
+## Configure in NOFX
+
+Add your API credentials through the NOFX web interface:
+
+1. Open NOFX dashboard (http://localhost:3000)
+2. Go to **Exchange Configuration**
+3. Enable **Binance**
+4. Enter your API Key and Secret Key
+5. Save configuration
+
+## Troubleshooting
+
+| Error | Solution |
+|-------|----------|
+| `Invalid API-key` | Check if API key is correct |
+| `Signature verification failed` | Check if Secret key is correct |
+| `IP not whitelisted` | Add your IP to whitelist or disable IP restriction |
+| `Futures not enabled` | Enable Futures permission in API settings |
+
+## Security Best Practices
+
+- Never share your API keys
+- Use IP whitelisting
+- Don't enable withdrawal permissions
+- Create separate API keys for different applications
+- Regularly rotate your API keys