Extend BuildPlayerProcessor to receive callbacks during a player build.
Additional resources: IFilterBuildAssemblies, IPostBuildPlayerScriptDLLs, IUnityLinkerProcessor, IPreprocessBuildWithReport, IPostprocessBuildWithReport.
| callbackOrder | 返回回调的相关回调顺序。系统会优先调用值较低的回调，然后再调用值较高的回调。 |
| PrepareForBuild | Implement this function to receive a callback before a player build starts. |