Add folder option

[FadyQJ]

Great app!

I noticed when the song name is very long the interface changes so the title should be truncated or maybe split onto multiple lines

Also I wanted to shazam around 70k tracks, I modified a bit the code to call the recognize file function reclusively and included an isrc column in the csv but it would be nice to have a recognize folder button for that option and if a song is not found just show a list of all the non-recognized songs in a separate csv file for example, or just add it in the csv file with empty values