admin: added list of users

crates/database/queries/users/get_all.sql

@@ -0,0 +1,15 @@
+select id,
+       created_at  as "created_at: DateTime<Utc>",
+       updated_at  as "updated_at: DateTime<Utc>",
+       is_admin    as "is_admin: bool",
+       username,
+       name,
+       email,
+       password,
+       password_recover,
+       paper_key,
+       is_archived as "is_archived: bool",
+       timezone
+from users
+
+order by created_at desc