[FEATURE]:Port Kysely jsonArrayFrom to Drizzle

### Describe what you want

I am trying to port this functionality from kysley to Drizzle, but I am struggling getting the typing to work.

Kysely function:
```
export function jsonArrayFrom(
expr: Expression
): RawBuilder[]> {
return sql`(select coalesce(json_agg(agg), '[]') from ${expr} as agg)`
}
```

Drizzle function:
```
export function jsonArrayFrom(subquery) {
return sql`(select coalesce(json_agg(agg), '[]') from ${subquery} as agg)`;
}
```

Usage example:
```
ctx.db.select({
id: plan,
displayName: plan.displayName,
deductibles: jsonArrayFrom(ctx.db.select().from(deductible)),
}).from(plan)
```