Integrate AI Agent Services and Chat Interface

- Added support for AI agent services, including `ConversationalAgentService`, to facilitate user interactions through a chat interface.
- Implemented `ChatTUI` for a terminal-based chat experience, allowing users to send messages and receive responses from the AI agent.
- Updated `EditorManager` to include options for displaying the agent chat widget and performance dashboard.
- Enhanced CMake configurations to include new source files for AI services and chat interface components.

This commit significantly expands the functionality of the z3ed system, paving the way for a more interactive and user-friendly experience in ROM hacking.

src/cli/service/agent/conversational_agent_service.cc

@@ -0,0 +1,52 @@
+#include "cli/service/agent/conversational_agent_service.h"
+
+#include "absl/strings/str_cat.h"
+#include "absl/strings/str_join.h"
+#include "absl/time/clock.h"
+#include "cli/service/ai/service_factory.h"
+
+namespace yaze {
+namespace cli {
+namespace agent {
+
+ConversationalAgentService::ConversationalAgentService() {
+  ai_service_ = CreateAIService();
+}
+
+absl::StatusOr<ChatMessage> ConversationalAgentService::SendMessage(
+    const std::string& message) {
+  // 1. Add user message to history.
+  history_.push_back({ChatMessage::Sender::kUser, message, absl::Now()});
+
+  // 2. Get response from the AI service using the full history.
+  auto response_or = ai_service_->GenerateResponse(history_);
+  if (!response_or.ok()) {
+    return absl::InternalError(absl::StrCat("Failed to get AI response: ",
+                                           response_or.status().message()));
+  }
+
+  const auto& agent_response = response_or.value();
+
+  // For now, combine text and commands for display.
+  // In the future, the TUI/GUI will handle these differently.
+  std::string response_text = agent_response.text_response;
+  if (!agent_response.commands.empty()) {
+    response_text += "\n\nCommands:\n" + absl::StrJoin(agent_response.commands, "\n");
+  }
+
+  ChatMessage chat_response = {ChatMessage::Sender::kAgent, response_text,
+                               absl::Now()};
+
+  // 3. Add agent response to history.
+  history_.push_back(chat_response);
+
+  return chat_response;
+}
+
+const std::vector<ChatMessage>& ConversationalAgentService::GetHistory() const {
+  return history_;
+}
+
+}  // namespace agent
+}  // namespace cli
+}  // namespace yaze