feat: ability to join call with user

src/command/join.rs

@@ -33,6 +33,16 @@ pub async fn handle(state: State, interaction: Interaction) {
     let guild_vcs = vcs.get(&guild_id).expect("TODO");
     tracing::error!(?guild_vcs, "TODO");
 
-    let user_in_vc_data = guild_vcs.get_left_and_data_for(&user_id);
+    let (&channel_id, user_in_vc_data) = guild_vcs.get_left_and_data_for(&user_id).expect("TODO");
     tracing::error!(?user_in_vc_data, "TODO");
+
+    let call = tokio::spawn({
+        let songbird = state.songbird.clone();
+        async move { songbird.join(guild_id, channel_id).await }
+    })
+    .await
+    .unwrap()
+    .expect("TODO");
+
+    tracing::error!(?call, "TODO");
 }