allow configuring the type used for a C# class

[hahn-kev]

this allows specifying the type for a class via the TranspilationSourceAttribute. Relates to #133

Example:

[TranspilationSource(TypescriptType = "{color: 'blue'|'red'}")]
public class AttributeAnnotatedClass5
{
    public string Color { get; init; }
}

becomes this:

type AttributeAnnotatedClass5 = {color: 'blue'|'red'}

This only works at the class level, not the field level. Doing this at the field level would require some more work and I didn't need it.

[backfromexile]

I'm not in favor of this change.

Is there a reason you cannot define an enum for the Color property and instead must resort to this?

[hahn-kev]

because that's not my actual use case. My actual use case is that I have a struct that is just a wrapper around a string with validation around it on the server side. There are converters in place so when it's serialized and deserialized it's just treated as a string. So I want to just tell Tapper to treat my struct as a string. Here's an example

public struct WsId {
    public string Value {get;set;}
}

expected TS type

type WsId = string;

this totally works, but right now after I run the type generator I have to rewrite the type from:
type WsId = {Value: string} into type WsId = string

that said any class could have a custom json converter and there's no way the code generator could determine what the type should be for a class with a custom converter. So it would be nice if there was an escape hatch to override the type that's generated.

[nenoNaninu]

After consideration, it was determined that Tapper does not need this feature.