module: add :lang graphql

This module enables GraphQL[1] usage within Doom with extended
functionality.

[1] https://www.graphql.org

modules/lang/graphql/autoload.el

@@ -0,0 +1,14 @@
+;;; lang/graphql/autoload.el -*- lexical-binding: t; -*-
+
+;;;###autoload
+(defun +graphql-doc-open-config ()
+  "Locate a .graphqlconfig file in the current tree and use that to point to a
+  schema."
+  (interactive)
+  (let ((config (json-read-file (graphql-locate-config "."))))
+    (let-alist config
+      (if-let ((endpoints .extensions.endpoints)
+               (endpoint (cdr (assq (intern (graphql--completing-read-endpoint endpoints)) endpoints))))
+          (let-alist endpoint
+            (graphql-doc--start .url `(:url ,.url :headers ,.headers)))
+        (error "No endpoint configurations in .graphqlconfig")))))