Function csi

src/ink/termio/csi.ts:45–51

(...args: (string | number)[])

 * Multiple args: last is final byte, rest are params joined by ;
 */
export function csi(...args: (string | number)[]): string {
  if (args.length === 0) return CSI_PREFIX
  if (args.length === 1) return `${CSI_PREFIX}${args[0]}`
  const params = args.slice(0, -1)
  const final = args[args.length - 1]
  return `${CSI_PREFIX}${params.join(SEP)}${final}`
}

/**
 * CSI final bytes - the command identifier