Generify endpoint groups as IntelliJ Modules

This allows them to be built sperately decreasing JAR size and also creates a better structure for generic service functions and business logic.

Lambdas/Lists/Item/src/ItemGET.java

@@ -0,0 +1,11 @@
+import com.amazonaws.services.lambda.runtime.Context;
+import com.amazonaws.services.lambda.runtime.RequestHandler;
+
+import java.util.Map;
+
+public class ItemGET implements RequestHandler<Map<String,Object>, String> {
+
+    public String handleRequest(Map<String, Object> inputMap, Context unfilled) {
+        return BasicHandler.handleRequest(inputMap, unfilled, ItemGetter.class);
+    }
+}