Group results by endpoint, change type, or other fields

[reuvenharrison]

It would be nice to be able to group breaking-changes or changelog results per different categories:

1. endpoint
2. change type
3. request/response
4. ...

Another, more advanced, option it to display results in a tree structure:
endpoint1
|- request
|--+ headers
|--+ path params
|--- query params
| |--- orderBy
| |--- enum value added "12"
|- response
|-- 200 OK
| + headers
|-- 401