feat: Enhance AI service with verbose logging and command help

- Added a `--verbose` flag to enable detailed debug output for the Gemini AI service.
- Updated `GeminiAIService` constructor to log initialization details when verbose mode is enabled.
- Modified `CreateAIService` to pass the verbose flag to the Gemini configuration.
- Enhanced command help in `ModernCLI` to categorize commands and provide detailed descriptions.
- Refactored `HandleSimpleChatCommand` to accept a pointer to `Rom` instead of a reference.
- Updated `ShowCategoryHelp` to display command categories and examples.
- Improved error handling and logging in `GeminiAIService` for better debugging.

src/cli/service/ai/service_factory.h

@@ -14,6 +14,7 @@ struct AIServiceConfig {
   std::string model;              // Provider-specific model name
   std::string gemini_api_key;     // For Gemini
   std::string ollama_host = "http://localhost:11434";  // For Ollama
+  bool verbose = false;           // Enable debug logging
 };
 
 // Create AI service using command-line flags