Add tinted-vim support

[JamyGolden]

https://github.com/tinted-theming/base16-vim has been renamed to https://github.com/tinted-theming/tinted-vim and the vim.g.base16_gui0X variables changed to vim.g.tinted_gui00. This PR adds support for the update while still allowing the theme to work for people using an outdated tinted-vim version.

Change happened in this commit: tinted-theming/tinted-vim@14f6ae0#diff-8e4da39bbefb342dbac24c7b8fe153c9e2b12798d48a2ea5a75721d462ed88faR20

[GordianDziwis]

Do I overlook something, or is the theme unnecessarily complex?

Why is here an indirection?

Would it be simpler to reference directly the tinted colors like this:

    normal = {
        a = { bg = vim.g.tinted_gui04, fg = vim.g.tinted_gui00, gui = 'bold' },
        b = { bg = vim.g.tinted_gui02, fg = vim.g.tinted_gui04 },
        c = { bg = vim.g.tinted_gui01, fg = vim.g.tinted_gui04 },
        z = { bg = vim.g.tinted_gui04, fg = vim.g.tinted_gui00 },
    },
    insert = {
        a = { bg = vim.g.tinted_gui0B, fg = vim.g.tinted_gui00, gui = 'bold' },
        b = { bg = vim.g.tinted_gui02, fg = vim.g.tinted_gui04 },
        c = { bg = vim.g.tinted_gui01, fg = vim.g.tinted_gui04 },
        z = { bg = vim.g.tinted_gui0B, fg = vim.g.tinted_gui00 },
    },
    visual = {
        a = { bg = vim.g.tinted_gui01, fg = vim.g.tinted_gui04, gui = 'bold' },
        b = { bg = vim.g.tinted_gui02, fg = vim.g.tinted_gui04 },
        c = { bg = vim.g.tinted_gui01, fg = vim.g.tinted_gui04 },
        z = { bg = vim.g.tinted_gui01, fg = vim.g.tinted_gui04 },
    },
    replace = {
        a = { bg = vim.g.tinted_gui13, fg = vim.g.tinted_gui02, gui = 'bold' },
        b = { bg = vim.g.tinted_gui02, fg = vim.g.tinted_gui04 },
        c = { bg = vim.g.tinted_gui01, fg = vim.g.tinted_gui04 },
        z = { bg = vim.g.tinted_gui13, fg = vim.g.tinted_gui02 },
    },
    command = {
        a = { bg = vim.g.tinted_gui08, fg = vim.g.tinted_gui01, gui = 'bold' },
        b = { bg = vim.g.tinted_gui02, fg = vim.g.tinted_gui04 },
        c = { bg = vim.g.tinted_gui01, fg = vim.g.tinted_gui04 },
        z = { bg = vim.g.tinted_gui08, fg = vim.g.tinted_gui01 },
    },
    inactive = {
        a = { bg = vim.g.tinted_gui01, fg = vim.g.tinted_gui04, gui = 'bold' },
        b = { bg = vim.g.tinted_gui02, fg = vim.g.tinted_gui04 },
        c = { bg = vim.g.tinted_gui01, fg = vim.g.tinted_gui04 },
        z = { bg = vim.g.tinted_gui01, fg = vim.g.tinted_gui04 },
    },

And why is vim handled differently than nvim?

[JamyGolden]

The reason for this setup is because this was originally built for base16-nvim, and later I created a PR to add base16-vim support on top of that so there are actually 2 plugins referenced in this file.

[JamyGolden]

I'm going to close this PR since it's a duplicate of #1352