Contrib: changing the configuration with paginated UIs

[bswck]

Describe the use case of a new functionality

One of the reasons for the creation of configzen was its scope management usefulness.
For example when modifying the settings through the application that uses configzen, one might want to make a nice UI for modifying particular configuration. When configuration gets really big, it might be really hard to fit it one form.

New functionality: abstract framework for configzen UIs and pagination.

Example Use

(Does not apply)

Additional context

No response