Project refactor, namespace cleanup, splitting UI/functionality.

src/Core/Input/IHandleInput.cs

@@ -0,0 +1,23 @@
+using UnityEngine;
+using UnityEngine.EventSystems;
+
+namespace UnityExplorer.Core.Input
+{
+    public interface IHandleInput
+    {
+        Vector2 MousePosition { get; }
+
+        bool GetKeyDown(KeyCode key);
+        bool GetKey(KeyCode key);
+
+        bool GetMouseButtonDown(int btn);
+        bool GetMouseButton(int btn);
+
+        BaseInputModule UIModule { get; }
+
+        PointerEventData InputPointerEvent { get; }
+
+        void AddUIInputModule();
+        void ActivateModule();
+    }
+}