feat: add direction button to qte

sonic-radiance.love/scenes/battlesystem/controllers/fighters/systems/choregraphy/qte/prompts/button.lua

@@ -2,7 +2,7 @@ local Button = Object:extend()
 local ButtonCircle = Object:extend()
 local TweenManager = require "birb.classes.time"
 
-local keys = {"A", "B", "C"}
+local keys = {"A", "B", "C", "select", "up", "down", "left", "right"}
 local BTN_SIZE = 21
 local CANVAS_SIZE = 21+2
 local SHAKETIME = 0.02
@@ -40,7 +40,7 @@ function Button:getFrame()
             return i
         end
     end
-    error("Non existing key " .. self.keys)
+    error("Non existing key " .. self.key)
 end
 
 function Button:update(dt, isFirst)