feat: add role colours to masquerades

feat: add `joined_at` property to members
feat: add `timeout` property to members (non-functional)

crates/quark/src/impl/dummy/servers/server_member.rs

@@ -3,6 +3,8 @@ use crate::{AbstractServerMember, Result};
 
 use super::super::DummyDb;
 
+use iso8601_timestamp::Timestamp;
+
 #[async_trait]
 impl AbstractServerMember for DummyDb {
     async fn fetch_member(&self, server: &str, user: &str) -> Result<Member> {
@@ -11,9 +13,11 @@ impl AbstractServerMember for DummyDb {
                 server: server.into(),
                 user: user.into(),
             },
+            joined_at: Timestamp::now_utc(),
             nickname: None,
             avatar: None,
-            roles: None,
+            roles: vec![],
+            timeout: None,
         })
     }