add youtube download

src/download.rs

@@ -0,0 +1,25 @@
+use crate::track::TrackInfo;
+use std::{path::Path, process::Command};
+
+pub fn download_from_youtube(url: &str) -> TrackInfo {
+    let output = Command::new("yt-dlp")
+        .args([
+            "-o",
+            "%(id)s",
+            "--extract-audio",
+            "--audio-format",
+            "mp3",
+            "--print",
+            "%(id)s",
+            url,
+        ])
+        .output()
+        .unwrap();
+
+    let filename = std::str::from_utf8(output.stdout.as_slice())
+        .unwrap()
+        .replace('\n', "")
+        + ".mp3";
+
+    TrackInfo::new(&Path::new(filename.as_str()))
+}