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/agent/conversational_agent_service.cc

@@ -152,6 +152,9 @@ ConversationalAgentService::ConversationalAgentService() {
 void ConversationalAgentService::SetRomContext(Rom* rom) {
   rom_context_ = rom;
   tool_dispatcher_.SetRomContext(rom_context_);
+  if (ai_service_) {
+    ai_service_->SetRomContext(rom_context_);
+  }
 }
 
 absl::StatusOr<ChatMessage> ConversationalAgentService::SendMessage(