[JAVA-14663] Update Graphql code for Boot 2.7.x changes and move to new module (#12729)

spring-boot-modules/spring-boot-graphql/src/main/java/com/baeldung/graphql/Post.java

@@ -0,0 +1,14 @@
+package com.baeldung.graphql;
+
+import lombok.Data;
+
+@Data
+public class Post {
+
+    private String id;
+    private String title;
+    private String text;
+    private String category;
+    private String authorId;
+
+}