1.0 beta: How to type drizzle?

### Enhancement hasn't been filed before.

- [x] I have verified this enhancement I'm about to request hasn't been suggested before.

### Describe the enhancement you want to request

Since Drizzle now wants `relations` rather than `schema`, how do we type the Drizzle object? I tried using `typeof relations` with no success, before it was working with `typeof schema`:

```ts
import { drizzle, type NeonDatabase } from 'drizzle-orm/neon-serverless';
import { relations } from '@myworkspace/db';

let db: NeonDatabase; // <- Doesnt work with relations

export const useDb = (): NeonDatabase => {
if (!db) {
db = drizzle('DATABASE_URL', {
relations,
casing: 'snake_case',
});
}

return db;
};
```

Start by inspecting the exported NeonDatabase type in drizzle-orm/neon-serverless and the relations export from @myworkspace/db. Compare its generic parameters with the drizzle(...) call using relations and casing: 'snake_case'. Done means the supported TypeScript typing for this 1.0 beta pattern is identified and documented with a working example.

Written by the indexing model from the issue text.