refactor: add base class for all game objects

entity/Entity.py

@@ -0,0 +1,14 @@
+import pygame
+
+class Entity:
+    def __init__(self):
+        pass
+
+    def update(self) -> None:
+        pass
+
+    def draw(self, surface: pygame.Surface) -> None:
+        pass
+
+    def collide(self, entity) -> bool:
+        pass