Integrate StandX exchange support by updating configuration files, adding environment variables, and enhancing documentation. Include new API endpoints and authentication details for StandX in README and dedicated documentation files. Update CLI and adapter logic to accommodate StandX functionalities.

docs/standx/reference.md

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+[API](https://docs.standx.com/standx-api/standx-api "API") Perps Reference
+
+## StandX Perps API Reference
+
+⚠️ This document is under construction.
+
+## Enums
+
+### Symbol
+
+Available symbols (Trading pairs):
+
+- `BTC-USD`
+
+### Margin Mode
+
+- `cross`
+- `isolated`
+
+### Token
+
+Available tokens:
+
+- `DUSD`
+
+### Order Side (side)
+
+- `buy`
+- `sell`
+
+### Order Type (order\_type)
+
+- `limit`
+- `market`
+
+### Order Status (status)
+
+- `open`
+- `canceled`
+- `filled`
+- `rejected`
+- `untriggered`
+
+### Time In Force (time\_in\_force)
+
+| Value | Description |
+| --- | --- |
+| `gtc` | Good Til Canceled - Order remains active until canceled |
+| `ioc` | Immediate Or Cancel - Fill as much as possible immediately, cancel the rest |
+| `alo` | Add Liquidity Only - Order added to book without immediate execution; only executes as resting order |
+
+### Resolution
+
+Kline resolutions:
+
+- `1T` - 1 tick
+- `3S` - 3 seconds
+- `1` - 1 minute
+- `5` - 5 minutes
+- `15` - 15 minutes
+- `60` - 60 minutes (1 hour)
+- `1D` - 1 day
+- `1W` - 1 week
+- `1M` - 1 month
+
+## Error Responses
+
+### Common Error Codes
+
+| Code | Description |
+| --- | --- |
+| 400 | Bad Request - Invalid request parameters |
+| 401 | Unauthorized - Authentication required or invalid token |
+| 403 | Forbidden - Insufficient permissions |
+| 404 | Not Found - Resource not found |
+| 429 | Too Many Requests - Rate limit exceeded |
+| 500 | Internal Server Error - Server error |
+
+Last updated on
+
+[Perps WebSocket API](https://docs.standx.com/standx-api/perps-ws "Perps WebSocket API")