SimpleTable with Record, w/o marker class

[bishabosha]

compared to the initial PR #81, this trades in dropping the marker class for a more complex implementation where the type of the Expression has to be re-computed on each .select, .insert etc, and passed as a type parameter to the record class. This also relies upon transparent inline and macros to compute the types (IntelliJ issue maybe?)

However as far as I know IntelliJ doesn't support match types either so probably a moot point

import scalasql.dialects.H2Dialect.*
import scalasql.namedtuples.*
import scalasql.*

case class Person(name: String, age: Int)
object Person extends SimpleTable[Person]()

case class City(name: String, population: Int, mayor: Person)
object City extends SimpleTable[City]()

@main def foo =
  City.select.filter(_.name === "foo")
  City.insert.values(City("foo", 42, Person("bar", 23)))
  City.insert.columns(_.name := "foo")
  City.insert.batched(_.name, _.population, _.mayor.name)(("foo", 42, "bar"), ("baz", 23, "qux"))

inside an expression, you have the type SimpleTable.Record[City, (name : Expr[String], population : Expr[Int], mayor : SimpleTable.Record[Person, (name : Expr[String], age : Expr[Int])])], inferred by metals