feat(colorscheme): add monokai-pro

[bernwo]

Adds the monokai-pro colorscheme.

[bernwo]

This PR is ready for review. @luxus or anyone

[Uzaaft]

LGTM. Just a question: Why not just use the default options for the setup? I.e just doing something like:

return {
    "loctvl842/monokai-pro.nvim", 
      opts = {}
}

[mehalter]

Please use the opts table rather than config function with a setup call

It should be as simple as this:

{
    "loctvl842/monokai-pro.nvim",
    opts = {
      terminal_colors = true,
      devicons = true, -- highlight the icons of `nvim-web-devicons`
      filter = "pro", -- classic | octagon | pro | machine | ristretto | spectrum
      plugins = {
        indent_blankline = {
          context_highlight = "pro", -- default | pro
          context_start_underline = false,
        },
      },
    },
  }

also please make sure the code is formatted with stylua

[mehalter]

moved to the opts notation. LGTM