Refactor unit classes to reduce code duplication and improve maintainability

- Updated the Unit base class to include common attributes and methods for all units.
- Refactored Bomb, Point, and Rat classes to inherit from the new Unit class structure.
- Implemented a consistent die method across units for better cleanup.
- Removed redundant code in unit initialization and added specific attributes where necessary.
- Deleted obsolete configuration file and added a comprehensive architecture guide for future reference.

units/points.py

@@ -8,16 +8,9 @@ AGE_THRESHOLD = 200
 
 class Point(Unit):
     def __init__(self, game, position=(0,0), id=None, value=5):
-        super().__init__(position)
-        self.id = id if id else uuid.uuid4()
-        self.game = game
-        self.position = position
-        self.bbox = (0, 0, 0, 0)
-        self.stop = 0
-        self.age = 0
-        self.speed = 4
-        self.partial_move = 0
-        self.position_before = position
+        super().__init__(game, position, id)
+        # Specific attributes for points
+        self.speed = 4  # Points age faster
         self.fight = False
         self.value = value
         self.game.add_point(self.value)
@@ -31,9 +24,10 @@ class Point(Unit):
         pass
                     
     def die(self, unit=None, score=None):
-        if not unit:
-            unit = self
-        self.game.units.pop(unit.id)
+        """Handle point cleanup. Points just disappear when they expire."""
+        target_unit = unit if unit else self
+        # Use base class cleanup
+        super().die()
         
         
     def draw(self):