Add YAML support and enhance AI service context handling

- Integrated yaml-cpp library into the project for YAML file parsing.
- Updated ConversationalAgentService to set ROM context in AI services.
- Extended AIService interface with SetRomContext method for context injection.
- Implemented SetRomContext in GeminiAIService and OllamaAIService.
- Enhanced PromptBuilder to load resource catalogues from YAML files.
- Added functions to parse commands, tools, examples, and tile references from YAML.
- Improved error handling for loading YAML files and added search paths for catalogues.
- Updated CMake configuration to fetch yaml-cpp if not found.
- Modified vcpkg.json to include yaml-cpp as a dependency.

src/cli/service/ai/ollama_ai_service.cc

@@ -1,6 +1,7 @@
 #include "cli/service/ai/ollama_ai_service.h"
 
 #include <cstdlib>
+#include <iostream>
 
 #include "absl/strings/str_cat.h"
 #include "absl/strings/str_format.h"
@@ -33,7 +34,10 @@ namespace cli {
 
 OllamaAIService::OllamaAIService(const OllamaConfig& config) : config_(config) {
   // Load command documentation into prompt builder
-  prompt_builder_.LoadResourceCatalogue("");  // TODO: Pass actual yaml path when available
+  if (auto status = prompt_builder_.LoadResourceCatalogue(""); !status.ok()) {
+    std::cerr << "⚠️  Failed to load agent prompt catalogue: "
+              << status.message() << std::endl;
+  }
   
   if (config_.system_prompt.empty()) {
     // Use enhanced prompting by default
@@ -51,6 +55,10 @@ std::string OllamaAIService::BuildSystemPrompt() {
   return prompt_builder_.BuildSystemInstruction();
 }
 
+void OllamaAIService::SetRomContext(Rom* rom) {
+  prompt_builder_.SetRom(rom);
+}
+
 absl::Status OllamaAIService::CheckAvailability() {
 #if !YAZE_HAS_HTTPLIB || !YAZE_HAS_JSON
   return absl::UnimplementedError(