Add Oxlint configuration and integrate linting commands

- Introduced a new `.oxlintrc.json` file to configure Oxlint for code quality checks.
- Updated `package.json` to include linting scripts (`lint` and `lint:fix`) for easier code maintenance.
- Enhanced documentation in `README` files to guide users on running Oxlint checks and applying fixes.

src/exchanges/nado/gateway.ts

@@ -1684,7 +1684,7 @@ export class NadoGateway {
     try {
       const text = typeof data === "string" ? data : data.toString("utf8");
       message = JSON.parse(text);
-    } catch (_error) {
+    } catch {
       return;
     }
     if (!message || typeof message !== "object") return;