feat: support adding multiple plugins at once

[cifaz]

#200 support addCmd add multiple parameters for faster
command:

vfox add java golang nodejs python dart dotnet flutter gradle maven

--source and --alias are disallowed when adding multiple plugins at once.

[aooohan]

--source and --alias only for first plugin

I think we can force disallow setting aliases and custom sources when adding multiple plugins at once.

Keep it simple and easy to use.

[cifaz]

--source and --alias only for first plugin

I think we can force disallow setting aliases and custom sources when adding multiple plugins at once.

Keep it simple and easy to use.

OK, thanks for your reply, I think your idea is better; I'll fix it;

[cifaz]

Please check it

[bytemain]

英文翻译可以再优化下，现在不太流畅。

[cifaz]

英文翻译可以再优化下，现在不太流畅。

我用中文了, 我的英文的不太好, 我只能看着翻译过来表达一下, 如果哪里不好, 可以提供一下帮助吗? 我也参照了git config, npm 等相关命令的描述; 尽我最大的可能去优化描述了;

[aooohan]

Thanks for the first contribution!