Add bun support for Ember CLI projects about ember-cli

[NullVoxPopuli]

Hello! I would like bun to support ember-cli as well. Bun seems very fast, but in practicality, it hasn't been very easy for any of my tools to adopt (ember-cli included!)

I tried running ember-cli with bun, and ran in to this: oven-sh/bun#5121

I'd also opened this issue: #10371 (so this #10444 may be considered a duplicate of #10371)

imo, it's not so much a feature that ember-cli supports bun, but moreso that bun needs to implement process/EventEmitter correctly 😅 (or declare a good reason why they won't, and then we can move on from there with bun-specific branching or something (but that's kinda gross)) (or, ember-cli removes it's process instanceof EventEmitter check, and either work-around the issue or do something simpler during initialization.

In particular, there is this code within ember-cli:

ember-cli/lib/utilities/will-interrupt-process.js

Line 27 in fa85990

if (outerProcess instanceof EventEmitter === false) {

I don't know why we need to capture an outerProcess. ember-cli has been around since the Node 0.x days, so it's possible that none of this code is needed in modern node, and by removing code that not needed by Node < 16, maybe we'll accidentally be compatible with bun.