[Solved] Stimulus controller cannot access `element.editor` after v2.0.0-beta.1

I'm using Trix in a Rails/webpacker app to give users a nice-looking WYSIWYG when generating PDF documents. In particular, users can insert references (implemented following [Chris Oliver's tutorial](https://gorails.com/episodes/at-mentions-with-actiontext)) whose value gets calculated when viewing the PDF document.

Since Trix version `2.0.0-beta.1`, my stimulus controller can no longer access `this.element.editor` when connecting, which returns `undefined`. I'm guessing this happened after changing how Trix gets started (in #1008)?

Calling `document.getElementById('#trix-editor').editor` works from a browser console, so I guess it's just that the Stimulus controller is attached before Trix has been applied to the base element.

I've tried calling `Trix.start()` at various steps, but that makes the JS crash, even if I disable chunking in webpacker config.

I found a workaround while researching this issue, see below.

##### Steps to Reproduce

```js
// app/assets/javascripts/packs/application.js
import Trix from "trix"
document.addEventListener("trix-before-initialize", () => {
// I18n config
})
import("controllers")
```

```js
// app/assets/javascripts/controllers/placeholder_controller.js
import { Controller } from "@hotwired/stimulus";
import Trix from "trix"

export default class extends Controller {
connect() {
this.editor = this.element.editor // -> undefined after 2.0.0-beta.1
}
}
```

##### Solution

I was able to work around this by calling `this.element.editor` dynamically when interacting with the controller, instead of storing it when it is connected.

```js
export default class extends Controller {
connect() {
// Don't store a reference to this.element.editor
}

get editor() {
return this.element.editor
}
}
```

##### Details

* Trix version: 2.0.4
* Browser name and version: Firefox 108.0.1
* Operating system: MacOS Monterey 12.6.2

Start with the reproduction in app/assets/javascripts/packs/application.js and app/assets/javascripts/controllers/placeholder_controller.js, then reproduce the timing difference between Stimulus connect() and Trix initialization. Compare the stored reference with the dynamic editor getter workaround; done would require a confirmed fix or documented lifecycle behavior, but the issue provides no test file or specific desired change.

Written by the indexing model from the issue text.