feat(core/database): implement user settings model

crates/core/database/src/drivers/reference.rs

@@ -2,14 +2,26 @@ use std::{collections::HashMap, sync::Arc};
 
 use futures::lock::Mutex;
 
-use crate::{Bot, File, User};
+use crate::{Bot, File, User, UserSettings};
 
 database_derived!(
     /// Reference implementation
     #[derive(Default)]
     pub struct ReferenceDb {
         pub bots: Arc<Mutex<HashMap<String, Bot>>>,
+        pub user_settings: Arc<Mutex<HashMap<String, UserSettings>>>,
         pub users: Arc<Mutex<HashMap<String, User>>>,
         pub files: Arc<Mutex<HashMap<String, File>>>,
+
+        pub servers: Arc<Mutex<HashMap<String, ()>>>,
+        pub server_bans: Arc<Mutex<HashMap<String, ()>>>,
+        pub server_members: Arc<Mutex<HashMap<String, ()>>>,
+        pub safety_reports: Arc<Mutex<HashMap<String, ()>>>,
+        pub safety_snapshots: Arc<Mutex<HashMap<String, ()>>>,
+        pub emoji: Arc<Mutex<HashMap<String, ()>>>,
+        pub messages: Arc<Mutex<HashMap<String, ()>>>,
+        pub channels: Arc<Mutex<HashMap<String, ()>>>,
+        pub channel_invites: Arc<Mutex<HashMap<String, ()>>>,
+        pub channel_unreads: Arc<Mutex<HashMap<String, ()>>>,
     }
 );