Added the scaffolding

shanty-dl/src/lib.rs

@@ -0,0 +1,5 @@
+//! Music downloading.
+//!
+//! Downloads music files using pluggable backends. The default backend uses
+//! yt-dlp, with support for additional backends (torrents, Soulseek, etc.)
+//! via a trait-based architecture.

shanty-dl/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("shanty-dl: music downloading");
+}