large refactor: reorganize code

src/common.rs

@@ -0,0 +1,11 @@
+use std::sync::Arc;
+use tokio::sync::Mutex;
+use std::collections::HashMap;
+use poise::serenity_prelude::UserId;
+
+pub struct Data {
+    pub users: Arc<Mutex<HashMap<UserId, usize>>>
+}
+
+pub type Error = Box<dyn std::error::Error + Send + Sync>;
+pub type Context<'a> = poise::Context<'a, Data, Error>;