feat: Add support for OXY2DEV/markview.nvim

[OXY2DEV]

Is your feature request related to a problem? Please describe.
Hi, Is it possible to add colorscheme support for my plugin markview.nvim?

Describe the solution you'd like
It would be great if the colorscheme came with the highlight groups for the plugin.

You can check all the highlight groups used by the plugin here.

Describe alternatives you've considered
By default, the plugin will generate highlight groups based on the colorscheme. So, currently it looks like this.

Catppuccin frappe

Catppuccin latte

Catppuccin macchiato

Catppuccin mocha

Additional context
Not provided