Changes to Get Wallet Balance

removed the coti enum value from the items/token response property for the response status 200

removed the plume enum value from the items/token response property for the response status 200

removed the xai enum value from the items/token response property for the response status 200

added the new mgusd enum value to the items/token response property for the response status 200

added the new usdg enum value to the items/token response property for the response status 200

added the new wirex-usdc enum value to the items/token response property for the response status 200

added the new wirex-usdc enum value to the items/token response property for the response status 200

added the optional property code to the response with the 400 status

endpoint added