Compile time checked queries

Would it be possible to support something similar to sqlx?

I think it could be really nice to have this feature when it comes to have a great developer experience 🙂

https://github.com/launchbadge/sqlx#sqlx-is-not-an-orm

Start by reviewing the issue's sqlx reference and comparing its compile-time checked query model with the current gel-rust API. The issue names no files, tests, or entry points, so the supported scope and acceptance criteria need to be established first. Done would mean an agreed implementation plan and tests demonstrating the intended developer experience.

Written by the indexing model from the issue text.