axmol v3 migrate guide

axmol v3 remove all deprecated APIs, so we write this guide. (WIP)

StringUtils removed?

A. StringUtils was renamed to text_utils, and the API format in it also was removed, use fmt::format instead

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Color3B removed?

A. Color3B removed and Color4B was renamed to Color32, Color4F renamed to Color, use Color32 instead Color3B

AsyncTaskPool

A. Use Director::getInstance()->getJobSystem() instead

Other renameing

• Director::convertToUI => Director::worldToScreen
• Director::convertToGL => Director::screenToWorld
• RenderViewImpl::createWithFullScreen => RenderViewImpl::createWithFullscreen