Declarative endpoint name prefixes

[rnett]

APIs are usually hierarchically structured, for ease of use. This is poorly supported in Krosstalk, you would have to explicitly add the endpoint prefix for every method in an KrosstalkEndpoint annotation.

Idea: Annotation for classes, objects, and files(?) (and eventually namespaces) that adds a prefix to Krosstalk endpoints within them. After the krosstalk prefix? Would need to restructure KrosstalkEndpoint to not include the prefix. The class one needs to apply to the companion object as well.

This gives something like:

@KrosstalkPrefix("item")
@Serializable
data class Item(val id: String){

    @KrosstalkMethod
    @KrosstalkEndpoint("description", GET)
    suspend fun getDescription(): String

    companion object {
        @KrosstalkMethod
        @KrosstalkEndpoint(method=POST)
        suspend fun create(id: String, description: String): Item
    }
}

I'd like a way to make the description point /item/$id/description, perhaps @KrosstalkPrefix on classes could include serialization mapping, and maybe for fields if they are all constructor params?