chore(monorepo): delta, january, quark

crates/quark/src/models/users/user_settings.rs

@@ -0,0 +1,6 @@
+use std::collections::HashMap;
+
+/// HashMap of user settings
+/// Each key is mapped to a tuple consisting of the
+/// revision timestamp and serialised data (in JSON format)
+pub type UserSettings = HashMap<String, (i64, String)>;