记住上次关闭时选中的target

[XinranSix]

Is your feature request related to a problem? Please describe.

cmake的vscode插件当选中一个 target 之后，即使重启vscode之后还是会选中 target，但 xmake 的 vscode 插件在重启 vscode 之后被选中的目标会变为 default。

Describe the solution you'd like

希望和 cmake 插件一样在重启 vscode 之后可以记住最后选中的目标

Describe alternatives you've considered

No response

Additional context

No response

[waruqi]

暂时没空搞，你可以提个 pr 过来