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/bomb.py

@@ -36,7 +36,7 @@ class Bomb(Unit):
             n = 1
         if n < 0:
             n = 0
-        image = self.game.bomb_assets[n]
+        image = self.game.graphics.bomb_assets[n]
         image_size = self.game.render_engine.get_image_size(image)
         self.rat_image = image
         partial_x, partial_y = 0, 0
@@ -70,7 +70,7 @@ class Timer(Bomb):
             print(f"Unit {target_unit.id} already dead")
             
         # Bomb-specific behavior: create explosion
-        self.game.spawn_unit(Explosion, target_unit.position)
+        self.game.unit_manager.spawn_unit(Explosion, target_unit.position)
         
         # Collect all explosion positions using vectorized approach
         explosion_positions = []
@@ -94,7 +94,7 @@ class Timer(Bomb):
         
         # Create all explosions at once
         for pos in explosion_positions:
-            self.game.spawn_unit(Explosion, pos)
+            self.game.unit_manager.spawn_unit(Explosion, pos)
         
         # Use optimized collision system to get all rats in explosion area
         # This replaces the nested loop with a single vectorized operation
@@ -105,7 +105,7 @@ class Timer(Bomb):
         
         # Kill all victims with score multiplier
         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 victim.id in self.game.units:
                 # Determine position based on partial_move
                 victim_pos = victim.position if victim.partial_move >= 0.5 else victim.position_before
@@ -128,7 +128,7 @@ class Explosion(Bomb):
             self.die()
             
     def draw(self):
-        image = self.game.assets["BMP_EXPLOSION"]
+        image = self.game.graphics.assets["BMP_EXPLOSION"]
         image_size = self.game.render_engine.get_image_size(image)
         partial_x, partial_y = 0, 0
         
@@ -186,7 +186,7 @@ class NuclearBomb(Unit):
 
     def draw(self):
         """Draw nuclear bomb on position"""
-        image = self.game.assets["BMP_NUCLEAR"]
+        image = self.game.graphics.assets["BMP_NUCLEAR"]
         image_size = self.game.render_engine.get_image_size(image)
 
         x_pos = self.position[0] * self.game.cell_size + (self.game.cell_size - image_size[0]) // 2