[Enhancement]: Send multiple files as a current directory

[abitrolly]

What changes would you like?

# dot at the end
wormhole send .
# multiple files
wormhole send file1 file2 file3

This could send all files in current directory (".") or specified files as a tar archive named "wormhole-multifile.tar".

And on the receiving end client could propose to unpack the archive automatically.

"Looks like you've receiving a multipack archive, do you want to unpack it automatically?"

Any extra information?

Manually tarring and untarring with wormhole is not convenient.