build: PaddedCell-style install.mjs + SDK-aligned packaging

install.mjs (--install/--build-only/--uninstall/--openclaw-profile-path),
tsconfig outDir dist/fabric, package.json openclaw file dep + main.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

node_modules/engine.io-client/build/esm/transports/websocket.node.d.ts

@@ -0,0 +1,14 @@
+import type { Packet, RawData } from "engine.io-parser";
+import { BaseWS } from "./websocket.js";
+/**
+ * WebSocket transport based on the `WebSocket` object provided by the `ws` package.
+ *
+ * Usage: Node.js, Deno (compat), Bun (compat)
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/WebSocket
+ * @see https://caniuse.com/mdn-api_websocket
+ */
+export declare class WS extends BaseWS {
+    createSocket(uri: string, protocols: string | string[] | undefined, opts: Record<string, any>): any;
+    doWrite(packet: Packet, data: RawData): void;
+}