add shortcut to copy current file/folder path

convenient to do further operation for the current located file/folder

Thanks for the suggestion, this is a decent idea. Although I fear that this might be hard to implement consistently, for example broot has varying clipboard support depending on the platform. But I haven't looked into any crates for doing this, so I don't know why it's like that. Pull requests are definitely welcome!

What default shortcut do you think would be best? The first that came to my mind is alt-C (and vim-style alt-Y) to copy the folder under the cursor, and alt-shift-C (and alt-shift-Y) to copy the folder you are currently in. What do you think?

it will be nice to be able to copy file path too. copy current folder may be redundant, or not nessesary