Browser: fix ws RawData type import for dts build

src/browser/chrome.ts

@@ -2,6 +2,7 @@ import { type ChildProcessWithoutNullStreams, spawn } from "node:child_process";
 import fs from "node:fs";
 import os from "node:os";
 import path from "node:path";
+import type WebSocket from "ws";
 import { ensurePortAvailable } from "../infra/ports.js";
 import { rawDataToString } from "../infra/ws.js";
 import { createSubsystemLogger } from "../logging/subsystem.js";