Export numeric types (Double, Float) as named type aliases, so generated TypeScript closely resembles Kotlin

[aSemy]

Double and Int are both converted directly to number. This is confusing on the TypeScript side.

@Serializable
data class Position(
  val x: Double,
  val y: Double,
  val level: Int,
)

// generated
export interface Position {
  x: number;
  y: number;
  level: number; // level looks the same as x and y, but if I produce a JSON message with 1.5, KXS will error
}

Unsigned numbers (because they are value classes) are converted to type aliases, e.g.

export interface Score {
  goals: UInt;
}

export type UInt = number;

In TypeScript this isn't safe (UInt can accept any numeric value, despite its name) - but it gives a good indication, and can be enhanced with brand typing (#7).

Can the other numeric primitives be exported as type aliases?

export type Byte = number
export type Short = number
export type Int = number
export type Long = number
export type Float = number
export type Double = number