Add colored text for price change in embeds

Price change values now display with ANSI color formatting matching the embed border color:
- Red text for negative price changes
- Green text for positive price changes
- Blue text for no change

Improves visual clarity by color-coding the percentage change field.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

bot.py

@@ -138,16 +138,19 @@ class StockBot(commands.Bot):
         if change_dollar > 0:
             color = discord.Color.green()
             change_emoji = "📈"
+            ansi_color = "\u001b[0;32m"  # Green
         elif change_dollar < 0:
             color = discord.Color.red()
             change_emoji = "📉"
+            ansi_color = "\u001b[0;31m"  # Red
         else:
             color = discord.Color.blue()
             change_emoji = "➡️"
+            ansi_color = "\u001b[0;34m"  # Blue
 
-        # Format change string
+        # Format change string with ANSI color
         change_sign = "+" if change_dollar >= 0 else ""
-        change_str = f"{change_sign}${change_dollar} ({change_sign}{change_percent}%)"
+        change_str = f"```ansi\n{ansi_color}{change_sign}${change_dollar} ({change_sign}{change_percent}%)\u001b[0m\n```"
 
         # Custom title for PYPL ticker
         if ticker == "PYPL":