Add Binance exchange support

- Updated the environment configuration to include Binance as a selectable exchange option.
- Enhanced the README documentation to reflect the addition of Binance.
- Implemented the Binance exchange adapter and integrated it into the existing exchange framework.
- Modified the basis arbitrage strategy to support Binance alongside existing exchanges.
- Added tests to ensure proper functionality and integration of Binance within the trading system.

.env.example

@@ -2,12 +2,23 @@
 LANG=zh
 
 # Exchange selection
-EXCHANGE=aster                       # Pick aster (default) or standx/grvt/lighter/backpack/paradex/nado
+EXCHANGE=aster                       # Pick aster (default) or binance/standx/grvt/lighter/backpack/paradex/nado
 
 # Aster API credentials
 ASTER_API_KEY=
 ASTER_API_SECRET=
 
+# Binance API credentials (set when EXCHANGE=binance)
+BINANCE_API_KEY=
+BINANCE_API_SECRET=
+BINANCE_SYMBOL=BTCUSDT               # Trading symbol. Use BTCUSDT_PERP to force perpetual when ambiguous.
+BINANCE_MARKET_TYPE=perp             # perp | spot | auto
+# BINANCE_SANDBOX=false
+# BINANCE_SPOT_REST_URL=https://api.binance.com
+# BINANCE_FUTURES_REST_URL=https://fapi.binance.com
+# BINANCE_SPOT_WS_URL=wss://stream.binance.com:9443/ws
+# BINANCE_FUTURES_WS_URL=wss://fstream.binance.com/ws
+
 # StandX authentication (set when EXCHANGE=standx)
 STANDX_TOKEN=
 STANDX_SYMBOL=BTC-USD