Drop old homegrown Mods for rosu_v2::Mods, implement rate change support (#52)

* Move mods to intermode wrapper

* Update rust to 1.79

* Move mods from homebrewed impl to rosu

* Display mod details

* Take clock-rate into account when calculating pp

* Allow specifying rate in mods input

* Formatting

* Fix clippy

youmubot-prelude/src/announcer.rs

@@ -142,7 +142,6 @@ impl AnnouncerHandler {
     }
 
     pub fn run(self, client: &Client) -> AnnouncerRunner {
-        
         AnnouncerRunner {
             cache_http: CacheAndHttp::from_client(client),
             data: client.data.clone(),

youmubot-prelude/src/setup.rs

@@ -39,8 +39,6 @@ pub async fn setup_prelude(
     // Set up the SQL client.
     data.insert::<crate::SQLClient>(sql_pool.clone());
 
-    
-
     Env {
         http: http_client,
         sql: sql_pool,