SDL Rendering: support arbitrary schema directives

[binaryseed]

No description provided.

[jessedrelick]

I am curious if this is related to the issue I mentioned here:

#387 (comment)

[kdawgwilk]

What is actually missing to support this? I dug in a bit and it appears everything is in place to support rendering directives

absinthe/lib/absinthe/schema/notation/sdl_render.ex

Lines 45 to 47 in 72ff9f9

	directive_definitions =
	directive_definitions
	|> Enum.reject(&(&1.module in @skip_modules))

The only directives that are not rendered are those built-ins listed here

absinthe/lib/absinthe/schema/notation/sdl_render.ex

Lines 21 to 26 in 72ff9f9

	@skip_modules [
	Absinthe.Phase.Schema.Introspection,
	Absinthe.Type.BuiltIns.Directives,
	Absinthe.Type.BuiltIns.Scalars,
	Absinthe.Type.BuiltIns.Introspection
	]

[binaryseed]

This Issue isn't really the core need, I'm going to close it and create a more meaningful one

[binaryseed]

#1003

[binaryseed]

FYI, SDL rendering of Type System Directives was added in #1010