Refactored player controls into PlayerInput class

outline/inputs.input.lx

@@ -10,6 +10,8 @@ input = {
     right = { keys = ["key_d", "right"] }
     up = { keys = ["key_w", "up"] }
     down = { keys = ["key_s", "down"] }
+
+    run = { keys = ["lshift"] }
     
     jump = {
       keys = ["space"]