bootstrap_package fields missing from content block

# Bug Report

## Prerequisites

* [ ] Can you reproduce the problem on TYPO3 v12.4 LTS
* [X] Can you reproduce the problem on TYPO3 v13.4 LTS
* [X] Did you [perform a cursory search](https://github.com/issues?q=is%3Aissue+user%3Abenjaminkott+repo%3Abenjaminkott%2Fbootstrap_package)
to see if your bug or enhancement is already reported?

## Description

Not sure if this is the right place to ask, but I just migrated a few EXT:mask content elements to EXT:content_blocks.
This worked quite well, but now I'm missing some fields from EXT:bootstrap_package in the appearance tab:

- frame_layout
- frame_options
- background_color_class
- background_image
- background_image_options
- background_image_options.behaviour
- background_image_options.parallax
- background_image_options.fade
- background_image_options.filter
- Maybe more?

They were still visible when using EXT:mask.

## Steps to Reproduce

- Create new content block with CLI command "typo3 make:content-block". Additional fields are not necessary
- Add this to config.yaml of new content block

```
basics:
- TYPO3/Appearance
- TYPO3/Links
```

The second step may be correct, or there is more configuration needed for those fields to appear. I couldn't find it in the manual, though.

### Expected behavior

Fields mentioned above are shown in backend form

### Actual behavior

Fields are missing

## Versions

TYPO3 13.4.27
bootstrap_package 15.0.4 and 16.0.0
content_blocks 1.4.3

Start with the generated content block from the `typo3 make:content-block` command and its `config.yaml`, focusing on the `TYPO3/Appearance` configuration. Compare the available fields with those provided by EXT:mask and check how the listed bootstrap_package fields are expected to be exposed. Done means the listed fields appear in the backend form for a content block using the documented configuration.

Written by the indexing model from the issue text.