Add add command for adding song to playlist (#1232)

* Add command for adding song to playlist

* edits for code style

* Return playlist dialog via `CommandResult::Modal`

---------

Co-authored-by: Henrik Friedrichsen <henrik@affekt.org>

src/commands.rs

@@ -272,6 +272,19 @@ impl CommandManager {
                 self.spotify.shutdown();
                 Ok(None)
             }
+            Command::AddCurrent => {
+                if let Some(track) = self.queue.get_current() {
+                    if let Some(track) = track.track() {
+                        let dialog = ContextMenu::add_track_dialog(
+                            self.library.clone(),
+                            self.queue.get_spotify(),
+                            track,
+                        );
+                        s.add_layer(dialog);
+                    }
+                }
+                Ok(None)
+            }
             Command::SaveCurrent => {
                 if let Some(mut track) = self.queue.get_current() {
                     track.save(&self.library);
@@ -284,6 +297,7 @@ impl CommandManager {
             | Command::Play
             | Command::Save
             | Command::SaveQueue
+            | Command::Add
             | Command::Delete
             | Command::Focus(_)
             | Command::Back