docs: update README and add bilingual configuration guides for exchanges

- Changed installation command from `npx` to `bunx` for consistency.
- Added bilingual configuration guides for Aster and Backpack exchanges.
- Updated exchange details in the README to reflect new market types and required settings.
- Enhanced clarity in the supported exchanges section with updated variable names and descriptions.

docs/exchanges/grvt.en.md

@@ -0,0 +1,93 @@
+# GRVT Configuration Guide
+
+中文版：[GRVT 配置教程](grvt.md)
+
+## Scope
+
+This guide configures the GRVT perpetual adapter. The standard authentication path uses an API key to create a session and an API secret to sign orders with EIP-712. GRVT's API instrument and the ritmex-bot display symbol are separate settings.
+
+## 1. Collect the account values and credentials
+
+1. Activate an account and subaccount on [GRVT](https://grvt.io/exchange/sign-up?ref=sea).
+2. Create trading credentials from the API Keys section in account settings.
+3. Save the API key and its signing secret.
+4. Record the numeric ID of the target subaccount.
+5. Read the exact instrument name from the GRVT market list or the `all_instruments` endpoint.
+
+The standard BTC perpetual instrument is `BTC_USDT_Perp`. Instrument names preserve GRVT's capitalization and separators.
+
+## 2. Minimal configuration
+
+```dotenv
+EXCHANGE=grvt
+GRVT_ENV=prod
+GRVT_API_KEY=<your_grvt_api_key>
+GRVT_API_SECRET=<your_grvt_signing_secret>
+GRVT_SUB_ACCOUNT_ID=<your_sub_account_id>
+GRVT_INSTRUMENT=BTC_USDT_Perp
+GRVT_SYMBOL=BTCUSDT
+```
+
+`GRVT_INSTRUMENT` is required by the current adapter. `GRVT_SYMBOL` controls ritmex-bot display values and unified position mapping. When omitted, the adapter derives it by removing `_` and `-` from the instrument.
+
+## 3. Select an environment
+
+| `GRVT_ENV` | Purpose |
+| --- | --- |
+| `prod` | Production |
+| `testnet` | Public test environment |
+| `staging` | GRVT staging environment |
+| `dev` | GRVT development environment |
+
+`mainnet` and `production` resolve to `prod`. The API key, secret, and subaccount ID must belong to the same environment.
+
+Testnet example:
+
+```dotenv
+GRVT_ENV=testnet
+GRVT_INSTRUMENT=BTC_USDT_Perp
+GRVT_SYMBOL=BTCUSDT
+```
+
+## 4. Reuse an existing session
+
+Advanced deployments can provide:
+
+```dotenv
+GRVT_COOKIE=<existing_session_cookie>
+GRVT_ACCOUNT_ID=<existing_account_id>
+```
+
+These two values bypass API-key login. Order signing still requires `GRVT_API_SECRET` or an external signer configured through `GRVT_SIGNER_PATH`.
+
+`GRVT_SIGNER_PATH` is designed for deployments that maintain their own signing service. The module must export a signing function that returns the GRVT order-signature fields.
+
+## 5. Verify the configuration
+
+```bash
+bun run index.ts doctor --exchange grvt --symbol BTCUSDT --json
+bun run index.ts market ticker --exchange grvt --symbol BTCUSDT --json
+```
+
+These commands create no orders. The ticker check validates the environment, session login, and instrument metadata.
+
+## Troubleshooting
+
+- `Missing GRVT_INSTRUMENT`: provide the complete instrument, such as `BTC_USDT_Perp`.
+- `Failed to authenticate with GRVT using API key`: verify the environment, API key, and subaccount ownership.
+- `GRVT_API_SECRET is not configured for local signing`: provide the signing secret or configure an external signer.
+- `Unable to load GRVT instrument metadata`: verify the instrument spelling and `GRVT_ENV`.
+- Expired signatures: synchronize the host clock.
+
+## Security
+
+- Use dedicated trading credentials for the API key and signing secret.
+- Protect the session cookie as an account-access credential.
+- Restrict file permissions and callers for an external signer module.
+
+## References
+
+- [GRVT API Documentation](https://api-docs.grvt.io/)
+- [GRVT Trading Streams and Authentication](https://api-docs.grvt.io/trading_streams)
+- [Repository GRVT SDK reference](../grvt/sdk-readme.md)
+