Show a description below the title field, if auto generation is enabled

Problem/Motivation

If auto-generating the title, if Automatically generate the label if the label field is left empty is enabled, add a description below the title field to explain, that the title will be auto-generated, if left empty.
The description should be appended in the form-altering additional to possible already existing description.

Could be something like:
"This field's content is auto-generated through a pattern, if left empty" or something like that.

If the maintainers agree this would be useful, I'd be happy to create a MR.
Maybe a native speaker could suggest a nice description?

Maybe we should add something similar, if the Automatically prefill the label option is enabled?

Both would improve UX for suite builders / authors to better understand what happens and how they can control it.

Thanks :)

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes