sqlc generate should emit a warning when using an unknown sql_package

[devonhk]

What do you want to change?

I had a typo in my sqlc.json file:

{
 "version": "2",
 "sql": [{
 "schema": "schema/schema.sql",
 "queries": "queries.sql",
 "engine": "postgresql",
 "gen":{
 "go":{
 "out": "db",
 "sql_package": "pgx/5"
 }
 }
 }]
}

When I ran sqlc generate it happily generated code without any warnings.

I think the dev experience could be improved with a warning message along the lines of:
sql_package: pgx/5 is unknown. Defaulting to database/sql codegen...

What database engines need to be changed?

No response

What programming language backends need to be changed?

Go