test(config-manager): add bun types reference for bun install test

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/cli/config-manager/bun-install.test.ts

@@ -1,3 +1,5 @@
+/// <reference types="bun-types" />
+
 import * as fs from "node:fs"
 
 import { afterEach, beforeEach, describe, expect, it, spyOn } from "bun:test"