[DONT MERGE] proposal: rewrote colorscheme to Lua

[DrKJeff16]

Description

[!CAUTION] @skbolton THIS IS A PROPOSAL

I have rewritten the colorscheme to Lua. My proposal here is to either split this into a new branch OR (prefferably) create a new port.

I'm new to making colorschemes specifically, so I'd like to know what you think.

Setup is now changed. I'll use lazy.nvim as an example:

{
    'embark-theme/vim',
    lazy = false,
    priority = 1000,
    name = 'embark',
    config = function()
        require('embark').setup({ italic = false }) -- This is all I have set up thus far
        vim.cmd.colorscheme('embark')
    end,
}