Added UIEventManager page in the wizard

Editor/WelcomeScreen/WelcomeScreen.Setup.cs

 
         public Action[] pages = new Action[]
         {
-            WelcomePage, SettingAssetPage, UnpackPackagePage
+            WelcomePage, SettingAssetPage,
+#if ENABLE_INPUT_SYSTEM
+            InputSystemPage,
+#endif
+            UnpackPackagePage
         };
 
         static void WelcomePage()
             GUILayout.Label(@"This wizard will help you set up your project so you can use and customize scripts.", Styles.body);
+        }
+        static void InputSystemPage()
+        {
+            GUILayout.Label("Input System package detected", Styles.title);
+            GUILayout.Space(12);
+            GUILayout.Label(@"It seems that you have the Input System configured for your project. In order to make it work with the UI Event Manager, we can create a configured prefab for you.", Styles.body);
+            GUILayout.Space(12);
+            if (GUILayout.Button("Create/Replace", GUILayout.Width(180), GUILayout.Height(32)))
+            {
+                if(AssetDatabase.LoadAssetAtPath<GameObject>("Assets/Resources/UIEventManager.prefab") == null 
+                    || EditorUtility.DisplayDialog("Prefab already present", "UIEventManager already exists, overwrite?", "Yes", "No"))
+                {
+                    var go = UIEventManager.CreateManagerObject();
+                    var prefab = PrefabUtility.SaveAsPrefabAsset(go, "Assets/Resources/UIEventManager.prefab");
+                    DestroyImmediate(go);
+                    Selection.activeObject = prefab;
+                }
+            }
+
 
         public const string kSettingsAssetPath = "Assets/Resources/GameplayIngredientsSettings.asset";
 

Runtime/Managers/Implementations/UIEventManager.cs

             if(selectable != null)
                 selectable.Select();
         }
+
+        internal static GameObject CreateManagerObject()
+        {
+            var go = new GameObject("UIEventManager");
+            var es = go.AddComponent<EventSystem>();
+            var uiem = go.AddComponent<UIEventManager>();
+            uiem.m_EventSystem = es;
+#if ENABLE_LEGACY_INPUT_MANAGER
+            if(!go.TryGetComponent(out StandaloneInputModule sm))
+                sm = go.AddComponent<StandaloneInputModule>();
+#endif
+
+#if ENABLE_INPUT_SYSTEM
+            if (!go.TryGetComponent(out InputSystemUIInputModule ism))
+                ism = go.AddComponent<InputSystemUIInputModule>();
+#endif
+            return go;
+        }
     }
 }

Runtime/AssemblyInfo.cs

+using System.Runtime.CompilerServices;
+[assembly: InternalsVisibleTo("GameplayIngredients-Editor")]

Runtime/AssemblyInfo.cs.meta

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+  serializedVersion: 2
+  defaultReferences: []
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+  icon: {instanceID: 0}
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