Generating UI schemas for complex JSON schemas

### Is your feature request related to a problem? Please describe.

With a large JSON schema, or a schema that has many `$ref` tags, calling [generateDefaultUISchema](https://jsonforms.io/api/core/functions/generatedefaultuischema) does not result in the creation of an all-inclusive UI schema because the uischema generator only generates “shallow” UI schemas. This means a UI schema would need to be created from scratch for every control, a potentially cumbersome and involved task. [](url)

### Describe the solution you'd like

Two suggestions:

1. Revise `generateDefaultUISchema` to generate a complete UI schema instead of a shallow one.
2. Enable the ability to create a partial UI schema that would allow modification to specific control(s) without having to specify _all_ JSON schema objects in the UI schema. In other words, display all objects by default (similar to not specifying a UI schema at all) but alter the specific ones called out in the UI schema. As it works now, if they aren't called out in the UI schema they aren't displayed.

### Describe alternatives you've considered

I haven't found any alternatives other than to manually create a large UI schema from scratch. Even then it's unclear whether that would work due to the shallow process previously described.

### Framework

Core

### RendererSet

Material

### Additional context

The main goal was to alter the display of a subset of controls in my UI which are referenced by `$ref` tags. Being able to alter a specific subset of controls without having to add all controls to a UI schema strikes me as a common use-case.