feat: add support for animated menu widgets

sonic-radiance.love/birb/modules/gui/menus/widgets/base.lua

@@ -37,6 +37,7 @@ function BaseWidget:new(menuName)
     self.canvas = {}
     self.canvas.texture = nil
     self.canvas.needRedraw = true
+    self.canvas.isAnimated = false
 
     self.order = 0
     self:register()
@@ -74,7 +75,7 @@ function BaseWidget:register()
 end
 
 function BaseWidget:redraw()
-    if (self.canvas.needRedraw) then
+    if (self.canvas.needRedraw or self.canvas.isAnimated) then
         self:generateTexture()
     end
 end