forth: implement error object
forth: implement error object


ErikSchierboom/x-common,ErikSchierboom/x-common,jmluy/x-common,petertseng/x-common,jmluy/x-common,exercism/x-common,jmluy/x-common,exercism/x-common,rpottsoh/x-common,petertseng/x-common,rpottsoh/x-common