Feature suggestion: Compile-time reflection of string literal unions and enums

[XorgonTheTypesafe]

say we have

type Fish = "one" | "two" | "red" | "blue";

or

enum Fish
{
   one,
   two,
   red,
   blue
}

It would be useful to have a way to refer to the possible values at runtime:
something like __valuesof(Fish) would transpile to
["one" , "two" , "red", "blue"] in both cases.

Also consider __enummap(Fish) that would transpile to

{
    "one":1,
    "two":2,
    "red":3,
    "blue":4    
}

or explicit enum values if specified. This would allow C#'s Enum.Parse functionality

[mhegazy]

The issue of type serialization/"reflection" has been discussed multiple times (#2902, #2577, #3060). we already have #3628 to track this discussion; so i suggest moving this proposal to that issue.