Changes to Execute Swap

added the new optional request property extra_params

the slippage_pct request property default value 1 was removed

added the optional property input_amount to the response with the 200 status

added the optional property output_amount to the response with the 200 status

added the optional property price to the response with the 200 status

added the optional property detail/items/ctx to the response with the 422 status

added the optional property detail/items/input to the response with the 422 status

endpoint added