make dark theme as default

Hi, it was supported.

For default theme scheme, Please navigate to Customizer -> Colors Settings -> Default Scheme.

To remove the theme switch, you need to use the Header Builder, the documentation here will help:

https://www.wpmoose.com/docs/yuki-theme-docs/header-footer-builder/