Adding debug request handler support to Rest.Li. Introducing a new debug request handler: Parseq Trace Debug Request Handler.

Changed the json parseq trace response to be encoded by the Parseq trace codec. Changed "json" path segment to "raw".

Removed unused import.

Added CHANGELOG.
Adding a temporary fix to ignore the unused folders in the parseq-tracevis artifact in maven central.

Removed unnecessary import.

Added CHANGELOG.