add custom background implementation and A3 collab

libs/bg_objects/footer.py

@@ -0,0 +1,12 @@
+from libs.texture import TextureWrapper
+
+class Footer:
+    def __init__(self, tex: TextureWrapper, index: int):
+        self.index = index
+        if self.index == -1:
+            return
+        tex.load_zip('background/regular', 'footer')
+    def draw(self, tex: TextureWrapper):
+        if self.index == -1:
+            return
+        tex.draw_texture('footer', str(self.index))