Field name consistency with the official API

[Sanqui]

The JSON export currently uses fields with different capitalization rules and sometimes even wording differences compared to the official API. For instance, timestampEdited and isPinned, which are subtly different from the official edited_timestamp and pinned. I feel like this is unnecessary and confusing for everybody who has to work with it. While it would be a breaking change for the project, I would seriously consider introducing consistency with official fields where possible.

[Tyrrrz]

This is on purpose actually. There is no attempt to keep the field names in sync because DCE's domain representation is vastly different from the Discord's API in several places.