Insanely huge initial commit

Assets/Extensions/Feel/MMTools/Tools/MMGUI/MMUIFollowMouse.cs

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+using UnityEngine;
+#if ENABLE_INPUT_SYSTEM && !ENABLE_LEGACY_INPUT_MANAGER
+using UnityEngine.InputSystem;
+#endif
+
+namespace MoreMountains.Tools
+{
+	/// <summary>
+	/// This component will let you have a UI object follow the mouse position
+	/// </summary>
+	public class MMUIFollowMouse : MonoBehaviour
+	{
+		public virtual Canvas TargetCanvas { get; set; }
+		protected Vector2 _newPosition;
+		protected Vector2 _mousePosition;
+        
+		protected virtual void LateUpdate()
+		{
+			#if !ENABLE_INPUT_SYSTEM || ENABLE_LEGACY_INPUT_MANAGER
+			_mousePosition = Input.mousePosition;
+			#else
+			_mousePosition = Mouse.current.position.ReadValue();
+			#endif
+			RectTransformUtility.ScreenPointToLocalPointInRectangle(TargetCanvas.transform as RectTransform, _mousePosition, TargetCanvas.worldCamera, out _newPosition);
+			transform.position = TargetCanvas.transform.TransformPoint(_newPosition);
+		}
+	}
+}