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.

vcpkg.json

@@ -7,7 +7,8 @@
       "name": "sdl2",
       "platform": "!uwp",
       "features": ["vulkan"]
-    }
+    },
+    "yaml-cpp"
   ],
   "builtin-baseline": "4bee3f5aae7aefbc129ca81c33d6a062b02fcf3b",
   "overrides": [],