Changes to Plan a content brief

added the new ai_search enum value to the request property sourceKind

added the new optional request property existingPageUrl

added the optional property brief/baseline to the response with the 200 status

added the optional property brief/competitorsToCounter to the response with the 200 status

added the optional property brief/missingCoverage to the response with the 200 status

added the optional property brief/recommendedAngle to the response with the 200 status

added the optional property brief/sourcesToReference to the response with the 200 status

endpoint added