Fixed pistol and knife sprites for retail. Added firing mechanism.

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

lib/features/player/player.dart

@@ -120,14 +120,11 @@ class Player {
   }
 
   void fire(int currentTime) {
+    // Only spend ammo if the weapon isn't a knife
     bool shotFired = currentWeapon.fire(currentTime, currentAmmo: ammo);
-
-    // If it was a gun (not a knife) and it fired, consume ammo
     if (shotFired && currentWeapon is! Knife) {
       ammo--;
     }
-
-    // TODO: We'll add Raycast hit detection here next!
   }
 
   void updateWeapon(int currentTime) {