Stelliberty 2.0.0

• This is the .NET version of Stelliberty and is still in testing. The source code will be opened after it becomes stable. Please help test it and report any issues.

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• 这是 Stelliberty 的 .NET 版本，目前仍在测试中，稳定后才会开源。希望大家多多测试并反馈问题。