Implement comprehensive IGDB integration for real-time game information

## Major Features Added

- **Enhanced igdblib.py**:
  * Added search_games() method with fuzzy game search
  * Added get_game_details() for comprehensive game information
  * Added AI-friendly data formatting with _format_game_for_ai()
  * Added OpenAI function definitions via get_openai_functions()

- **OpenAI Function Calling Integration**:
  * Modified OpenAIResponder to support function calling
  * Added IGDB function execution with _execute_igdb_function()
  * Backward compatible - gracefully falls back if IGDB unavailable
  * Auto-detects gaming queries and fetches real-time data

- **Configuration & Setup**:
  * Added IGDB configuration options to config.toml
  * Updated system prompt to inform AI of gaming capabilities
  * Added comprehensive IGDB_SETUP.md documentation
  * Graceful initialization with proper error handling

## Technical Implementation

- **Function Calling**: Uses OpenAI's tools/function calling API
- **Smart Game Search**: Includes ratings, platforms, developers, genres
- **Error Handling**: Robust fallbacks and logging
- **Data Formatting**: Optimized for AI comprehension and user presentation
- **Rate Limiting**: Respects IGDB API limits

## Usage

Users can now ask natural gaming questions:
- "Tell me about Elden Ring"
- "What are good RPG games from 2023?"
- "Is Cyberpunk 2077 on PlayStation?"

The AI automatically detects gaming queries, calls IGDB API, and presents
accurate, real-time game information seamlessly.

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

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

config.toml

@@ -10,4 +10,9 @@ history-limit = 10
 welcome-channel = "welcome"
 staff-channel = "staff"
 join-message = "Hi! I am {name}, and I am new here."
-system = "You are an smart AI"
+system = "You are a smart AI assistant with access to real-time video game information through IGDB. When users ask about games, game recommendations, release dates, platforms, or any gaming-related questions, you can search for accurate and up-to-date information. You can search for games by name and get detailed information including ratings, platforms, developers, genres, and summaries."
+
+# IGDB Configuration for game information
+igdb-client-id = "YOUR_IGDB_CLIENT_ID"
+igdb-access-token = "YOUR_IGDB_ACCESS_TOKEN"
+enable-game-info = true