resource factory refactor

[briaguya-ai]

Basically the ResourceLoader will have a matrix of resource type, resource version, and reader version instead of just a map of resource type ... Also change ResourceInitData.IsXml to be ResourceInitData.ReaderType

pretty much we want to support doing this in ResourceLoader.LoadResource

    auto factory = mFactories[fileToLoad->InitData->Type][fileToLoad->InitData->Version][fileToLoad->InitData->ReaderType];
    if (factory == nullptr) {
        SPDLOG_ERROR("Failed to load resource: Factory does not exist ({} - {})", fileToLoad->InitData->Type,
                     fileToLoad->InitData->Path);
    }

    return factory->ReadResource(fileToLoad);

[briaguya-ai]

this part has been completed by #437