/**
 * Notes:
 *
 * - path.resolve() turns /kui/x into c:\kui\x. We just want to
 * absolute-ify a local filepath if it isn't already so.
 *
 * - this only works for local filepaths; if we wanted this to work
 * for all kui VFS, we would need to use `vfs ls`, which is
 * asynchronous.
 *
 * @return An absolute path for the given `path`, only if it is not already absolute
 */
export default function absolute(filepath: string): string;