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/handlers/agent.cc

@@ -4,8 +4,12 @@
 #include <string>
 #include <vector>
 
+#include "absl/flags/declare.h"
+#include "absl/flags/flag.h"
 #include "absl/status/status.h"
 
+ABSL_DECLARE_FLAG(bool, quiet);
+
 namespace yaze {
 namespace cli {
 namespace agent {
@@ -133,7 +137,7 @@ absl::Status Agent::Run(const std::vector<std::string>& arg_vec) {
     return agent::HandleChatCommand(rom_);
   }
   if (subcommand == "simple-chat") {
-    return agent::HandleSimpleChatCommand(subcommand_args, rom_, absl::GetFlag(FLAGS_quiet));
+    return agent::HandleSimpleChatCommand(subcommand_args, &rom_, absl::GetFlag(FLAGS_quiet));
   }
 
   return absl::InvalidArgumentError(std::string(agent::kUsage));