Add discord-agent files and enable reply notifications

- Add discord_agent.py with reply() instead of send() for user notifications
- Add Discord bot Dockerfile and requirements.txt
- Add bot cogs (base_cog.py and integration_cog.py)
- Update .gitignore to track discord-agent directory
- Bot now replies to messages triggering notifications for users

discord-agent/cogs/base_cog.py

@@ -0,0 +1,57 @@
+"""Discord Agent Base Cog Template
+
+This provides a base class for all integration cogs with common functionality.
+"""
+import discord
+from discord.ext import commands
+import logging
+from typing import Optional
+
+logger = logging.getLogger(__name__)
+
+
+class BaseCog(commands.Cog):
+    """Base cog class with common functionality for all integration cogs."""
+    
+    def __init__(self, bot):
+        self.bot = bot
+        self.config = bot.config
+        self.session = getattr(bot, 'session', None)
+        
+    @commands.Cog.listener()
+    async def on_ready(self):
+        """Called when the cog is ready."""
+        logger.info(f"{self.qualified_name} cog ready")
+    
+    @commands.Cog.listener()
+    async def on_command_error(self, ctx, error):
+        """Handle command errors."""
+        if isinstance(error, commands.CommandNotFound):
+            return  # Ignore command not found errors
+        elif isinstance(error, commands.MissingRequiredArgument):
+            await ctx.send(f"❌ Missing required argument: {error.param.name}")
+        elif isinstance(error, commands.BadArgument):
+            await ctx.send(f"❌ Invalid argument provided")
+        else:
+            logger.error(f"Command error in {ctx.command}: {error}", exc_info=error)
+            await ctx.send("❌ An error occurred while processing your command")
+    
+    def create_embed(self, title: str, description: str = None, 
+                    color: discord.Color = discord.Color.blue()) -> discord.Embed:
+        """Create a standard embed with consistent styling."""
+        embed = discord.Embed(title=title, description=description, color=color)
+        embed.set_footer(text=f"Requested by {self.bot.user.name}")
+        return embed
+    
+    async def check_integration_enabled(self, ctx, integration_name: str) -> bool:
+        """Check if an integration is enabled."""
+        integrations = self.config.get('integrations', {}).get('enabled', [])
+        if integration_name not in integrations:
+            await ctx.send(f"❌ {integration_name.title()} integration is not enabled.")
+            return False
+        return True
+
+
+async def setup(bot):
+    """Setup function for loading the cog."""
+    await bot.add_cog(BaseCog(bot))