Added KGraphQL to the code list

Author: jeggy

src/content/code/language-support/java-kotlin-android/server/kgraphql.md

@@ -0,0 +1,61 @@
+---
+name: KGraphQL
+description: KGraphQL is a Kotlin implementation of GraphQL. It provides a rich DSL to set up the GraphQL schema.
+url: https://kgraphql.io/
+github: aPureBase/KGraphQL
+---
+
+Here's a simple example on how to create a simple schema based on a kotlin data class plus a property resolver that gets applied onto your class.
+
+```kotlin
+data class Article(val id: Int, val text: String)
+
+fun main() {
+    val schema = KGraphQL.schema {
+        query("article") {
+            resolver { id: Int?, text: String ->
+                Article(id ?: -1, text)
+            }
+        }
+        type<Article> {
+            property<String>("fullText") {
+                resolver { article: Article ->
+                    "${article.id}: ${article.text}"
+                }
+            }
+        }
+    }
+
+    schema.execute("""
+        {
+            article(id: 5, text: "Hello World") {
+                id
+                fullText
+            }
+        }
+    """).let(::println)
+}
+```
+
+KGraphQL is using coroutines behind the scenes to provide great asynchronous performance.
+
+See [KGraphQL docs](https://kgraphql.io/Installation/) for more in depth usage.
+
+## Ktor Plugin
+
+KGraphQL has a Ktor plugin which gives you a fully functional GraphQL server with a single [install](https://ktor.io/docs/zfeatures.html) function call. Example below shows how to set up a GraphQL server within Ktor and it will give you a [GraphQL Playground](https://github.com/graphql/graphql-playground) out of the box by entering `localhost:8080/graphql`.
+
+```kotlin
+fun Application.module() {
+  install(GraphQL) {
+    playground = true 
+    schema {
+      query("hello") {
+        resolver { -> "World!" }
+      }
+    }
+  }
+}
+```
+
+You can follow the [Ktor tutorial](https://kgraphql.io/Tutorials/ktor/) to set up a KGraphQL server with ktor from scratch up.