Support TypeSystem Directives

[binaryseed]

The latest GraphQL spec includes TypeSystemDirective (directives that annotate the type system) alongside the ExecutableDirective (directives that annotate query execution)

https://spec.graphql.org/draft/#TypeSystemDirectiveLocation

Absinthe has full support for ExecutableDirectives, but only partial support for TypeSystemDirectives

[kdawgwilk]

Can I get more details on what support is missing for TypeSystemDirectives? I am looking at diving into this issue and would love any guidance.

[binaryseed]

One part of this (the SDL rendering) is accomplished in this PR: #1010

I've got more working, and will submit additional PRs.

Unfortunately, I don't have much guidance since I'm figuring this out as I go, and there's probably a bit of design work with the rest of the core team to get the rest of this in place.

[binaryseed]

One example of folks expecting Type System Directives to be available inside the resolver function: #964

[binaryseed]

FYI, there's a comment in ^^ that includes a bit of a workaround that would enable passing directive details via meta using hydrate