Surface bundle class on node type edit form

Thanks for the interesting proposal! I'm a bit torn:

Pro: It's helpful debugging info, especially for future developers working on sites built by previous folks, etc.

Con: It's completely un-actionable noise to many of the people who might use this form, it's potentially scary / confusing, etc.

If we do it, I think we'd want to improve the UI a bit:

1. No where else in the UI do we see "bundle".
2. In Slack, @mstrelan proposed adding the interface(s) the class implements.
3. In that case (and maybe regardless), we probably want it inside a collapsed <details> element.

Given that the target audience of this info are developers (current and future), this seems like something devel → should provide, not core. However, I can't just easily move this issue to the Devel issue queue, since they turned off their d.o queue and moved to https://gitlab.com/drupalspoons/devel/-/issues instead. If you're still interested, I vote you open a new issue over there and we close this one.

Thanks! -Derek