[Summary] Good Toolchain Tasks for Newcomers

[Thespica]

To Be Done

• [Doc] [Doc][Developer] Documentation about how to run test #618
• [Loader] [Enhancement] Improve user experience for loader #442
• [Hubble] [Bug] hubble1.5.0 执行创建顶点语句报错Undefined vertex label: '??' #602
• [Hubble] [Bug] can't load files when > 10GB in hubble #496

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Done

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How to get start? Please refer to apache/hugegraph#2212