feature: Customize markdown code block backgroundcolor and foregroundcolor without lanuage indicator

[jonahfang]

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

No

Describe the solution you'd like

I want to change the backgroundcolor and foregroundcolor, how to do it in setup configuration?

Describe alternatives you've considered

No

Additional context

No response

[jonahfang]

I use rose-pine with neovim treesitter.