Add non-regression test states and Bluetooth diagnostic script

- Introduced a new JSON file containing non-regression test states with detailed unit information, including positions, ages, and movement directions across multiple frames.
- Added a shell script for Bluetooth diagnostics that checks system information, Bluetooth binaries, running processes, D-Bus status, Bluetooth controller details, and audio stack status, providing a comprehensive overview for troubleshooting.

units/gas.py

@@ -32,7 +32,7 @@ class Gas(Unit):
         )
         
         for victim_id in victim_ids:
-            victim = self.game.get_unit_by_id(victim_id)
+            victim = self.game.unit_manager.get_unit_by_id(victim_id)
             if victim and isinstance(victim, Rat):
                 if victim.partial_move > 0.5:
                     victim.gassed += 1
@@ -43,14 +43,14 @@ class Gas(Unit):
         )
         
         for victim_id in victim_ids_before:
-            victim = self.game.get_unit_by_id(victim_id)
+            victim = self.game.unit_manager.get_unit_by_id(victim_id)
             if victim and isinstance(victim, Rat):
                 if victim.partial_move < 0.5:
                     victim.gassed += 1
         
         if self.age % self.speed:
             return
-        parent = self.game.get_unit_by_id(self.parent_id)
+        parent = self.game.unit_manager.get_unit_by_id(self.parent_id)
         if (parent) or self.parent_id is None:
             print(f"Gas at {self.position} is spreading")
                 # Spread gas to adjacent cells
@@ -61,7 +61,7 @@ class Gas(Unit):
                 if not self.game.map.is_wall(new_x, new_y):
                     if not any(isinstance(unit, Gas) for unit in self.game.units.values() if unit.position == (new_x, new_y)):
                         print(f"Spreading gas from {self.position} to ({new_x}, {new_y})")
-                        self.game.spawn_unit(Gas, (new_x, new_y), parent_id=self.parent_id if self.parent_id else self.id)
+                        self.game.unit_manager.spawn_unit(Gas, (new_x, new_y), parent_id=self.parent_id if self.parent_id else self.id)
     def collisions(self):
         pass
 
@@ -72,7 +72,7 @@ class Gas(Unit):
         
         
     def draw(self):
-        image = self.game.assets["BMP_GAS"]
+        image = self.game.graphics.assets["BMP_GAS"]
         image_size = self.game.render_engine.get_image_size(image)
         self.rat_image = image
         partial_x, partial_y = 0, 0