Completely remake mobile gameplayer buttons, and rever graphics renderer changes and just have linux on Vulkan instead

Assets/Scripts/HoldableButton.cs

@@ -0,0 +1,17 @@
+using UnityEngine;
+using UnityEngine.EventSystems;
+
+public class HoldableButton : MonoBehaviour, IPointerDownHandler, IPointerUpHandler
+{
+    public bool isPressed;
+
+    public void OnPointerDown(PointerEventData eventData)
+    {
+        isPressed = true;
+    }
+
+    public void OnPointerUp(PointerEventData eventData)
+    {
+        isPressed = false;
+    }
+}