Improve display of schemas with mutually-exclusive required properties

Assume the pattern
```
allOf:
- oneOf:
    - required:
        - ...
    - ...
- if:
    required:
        - ...
  then:
    ...
- ...
```
to be the canonical form for ethdebug/format schemas to represent the concept of schemas that are defined with different subschemas depending on which set of mutually-exclusive required properties are included
Detect this pattern
Display it with custom wording instead of the default docusaurus-json-schema-plugin presentation of allOfs and such

ethdebug / format