split main.rs into files

src/commands/leave.rs

@@ -0,0 +1,17 @@
+use crate::state::State;
+use std::error::Error;
+use twilight_model::channel::Message;
+
+pub(crate) async fn leave(
+    msg: Message,
+    state: State,
+) -> Result<(), Box<dyn Error + Send + Sync + 'static>> {
+    tracing::debug!(
+        "leave command in channel {} by {}",
+        msg.channel_id,
+        msg.author.name
+    );
+    let guild_id = msg.guild_id.unwrap();
+    state.songbird.leave(guild_id).await?;
+    Ok(())
+}