Enhance ping response message with playful emoji

cogs/ping_cog.py

@@ -11,7 +11,7 @@ class PingCog(commands.Cog, name="Ping"):
     async def _ping_logic(self):
         """Core logic for the ping command."""
         latency = round(self.bot.latency * 1000)
-        return f'Pong! Response time: {latency}ms'
+        return f'Pong! ^~^ Response time: {latency}ms'
 
     # --- Prefix Command (for backward compatibility) ---
     @commands.command(name="ping")