📝 Provide detailed reproduction steps (if any)

1. Create any CKEditor5 build

✔️ Expected result

@ckeditor/ckeditor5-watchdog is not automatically included, or can be excluded via some configuration

❌ Actual result

@ckeditor/ckeditor5-watchdog is always present

📃 Other details

this commit made the watchdog code a mandatory, non-tree-shake-able dependency of @ckeditor/ckeditor5-core. I don't use or want the watchdog functionality, but I can't keep the ~42k of code out of my bundle.

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