load different user setting options in different os

[Mafa-Qyc]

for some settngs such as compiler paths are quite different in different OS.
add labels like "settings.windows" in user settings.json,and load configurations under these labels according to OS.

[sandy081]

/duplicate

[vs-code-engineering]

Thanks for creating this issue! We figured it's covering the same as another one we already have. Thus, we closed this one as a duplicate. You can search for similar existing issues. See also our issue reporting guidelines.

Happy Coding!