Feat/support binance (#22)

* add docs

* 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.

* Enhance README with detailed Binance exchange configuration

- Added comprehensive instructions for setting up Binance as an exchange option.
- Included environment variable specifications for API keys, market types, and trading symbols.
- Provided examples for both perpetual and spot trading strategies.
- Clarified the use of WebSocket and REST for the Binance adapter.

* Enhance exchange support and testing framework

- Added a new test suite for exchange contracts to ensure consistency and functionality across supported exchanges.
- Refactored exchange ID handling to utilize a centralized list of supported exchanges, improving maintainability.
- Updated CLI argument parsing and help documentation to reflect the new exchange structure.
- Introduced utility functions for validating supported exchanges and their display names.
- Enhanced the BasisApp and strategy runner to leverage the new exchange validation logic.
- Added a new test command for running exchange-related tests.

* Refactor exchange contract tests and update CLI commands

- Removed the trailing supported exchanges set and simplified the logic for trailing stop support in the exchange contract tests.
- Updated the test command for exchange contracts to exclude unnecessary tests, streamlining the testing process.
- Enhanced test descriptions for clarity and improved understanding of the functionality being tested.

.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