Better error message for triggers when accessing special scope keywords in triggers

[Gobot1234]

# schema
        trigger prohibit_queue after insert for each do (
            select assert(__new__.location.queue_in_use, message := "Queue has been manually disabled")
        );

error: could not resolve partial path 
    ┌─ /Users/James/Developer/ignis/apps/anvil2/dbschema/sign_in.esdl:170:27
    │
170 │             select assert(.queue_in_use, message := "Queue has been manually disabled")
    │                           ^^^^^^^^^^^^^ error

gel error: cannot proceed until schema files are fixed

Currently the error looks like this. Could it be updated to give a hint to use new/old?