Project refactor, namespace cleanup, splitting UI/functionality.

src/Core/Input/NoInput.cs

@@ -0,0 +1,23 @@
+using UnityEngine;
+using UnityEngine.EventSystems;
+
+namespace UnityExplorer.Core.Input
+{
+    // Just a stub for games where no Input module was able to load at all.
+
+    public class NoInput : IHandleInput
+    {
+        public Vector2 MousePosition => Vector2.zero;
+
+        public bool GetKey(KeyCode key) => false;
+        public bool GetKeyDown(KeyCode key) => false;
+
+        public bool GetMouseButton(int btn) => false;
+        public bool GetMouseButtonDown(int btn) => false;
+
+        public BaseInputModule UIModule => null;
+        public PointerEventData InputPointerEvent => null;
+        public void ActivateModule() { }
+        public void AddUIInputModule() { }
+    }
+}