docs: Add GraphQLClient.jl

src/content/code/language-support/julia/client/graphqlclient-jl.md

@@ -0,0 +1,51 @@
+---
+name: GraphQLClient.jl
+description: A Julia GraphQL client for seamless integration with a GraphQL server
+url: https://github.com/DeloitteDigitalAPAC/GraphQLClient.jl
+github: DeloitteDigitalAPAC/GraphQLClient.jl
+---
+
+- **Querying**, **mutating** and **subscribing** without manual writing of query strings (unless you want to!)
+- Deserializing responses directly into Julia types
+- **Construction of Julia types** from GraphQL objects
+- Using **introspection** to help with querying
+
+### Quickstart
+
+Install with Julia's package manager
+
+```
+using Pkg; Pkg.add("GraphQLClient")
+using GraphQLClient
+```
+
+Connect to a server
+
+```julia
+client = Client("https://countries.trevorblades.com")
+```
+
+Build a Julia type from a GraphQL object
+
+```julia
+Country = GraphQLClient.introspect_object(client, "Country")
+```
+
+And query the server, deserializing the response into this new type
+
+```julia
+response = query(client, "countries", Vector{Country}, output_fields="name")
+```
+
+Alternatively write the query string manually
+
+```julia
+query_string = """
+    {
+    countries{
+        name
+    }
+}"""
+
+response = GraphQLClient.execute(client, query_string)
+```