[Feature request] Support for zero-width joiner (ZWJ) U+200D (in preview and file name) (bug)

[Andrew15-5]

There is some problem with icons #583, but this is probably different.

If I add ctpv previewer and create a file with one Unicode character "👨‍💻" it will be shown as 2 characters in lf (using ctpv that uses cat command) and as 1 character in (even) simple dash shell (using cat directly).

The same goes to file names: