change: gravity settings functions and deprecation of jump/gravity split

Assets/Scripts/Core/MathExtensions.cs

@@ -16,4 +16,11 @@ public static class MathExtensions{
     public static Color Alpha(this Color input, float newAlpha){
         return new Color(input.r, input.g, input.b, newAlpha);
     }
+    
+    public static Vector2 Rotate(this Vector2 v, float delta) {
+        return new Vector2(
+            v.x * Mathf.Cos(delta) - v.y * Mathf.Sin(delta),
+            v.x * Mathf.Sin(delta) + v.y * Mathf.Cos(delta)
+        );
+    }
 }