feat: xoria colorscheme

[nkoturovic]

Adds xoria colorscheme with configured standard colorscheme, TS colorscheme, html, markdown, VimWiki etc ...

• Created: xoria.yml
• Generated: colors/xoria.vim
• Added terminal colors: term/xoria.Xresources
• Added preview demo image in assets/xoria.png

Some further work/fine-tuning may be required

Galaxy Line Colors (status bar)

Edit: ~/.config/nvim/lua/lv-galaxyline/init.lua

• Comment default colors
• Add these Xoria theme colors instead:
• Also if PR get accepted, it would be nice to add it with other (commented) colors in lv-galaxyline/init.lua

-- colors for Xoria theme
local colors = {
    bg = '#272727',
    yellow = '#FFFFAF',
    dark_yellow = '#D7BA7D',
    cyan = '#4EC9B0',
    green = '#96c272',
    light_green = '#B5CEA8',
    string_orange = '#CE9178',
    orange = '#FFB870',
    purple = '#C586C0',
    magenta = '#88C0D0',
    grey='777777',
    blue = '#87AFDF',
    vivid_blue = '#6BA8F2',
    light_blue = '#88C0D0',
    red = '#DF8787',
    error_red = '#FF8080',
    info_yellow = '#FFCC66'
}

[nkoturovic]

Moved to other Pull request since this one became bloated

New Pull Request: https://github.com/ChristianChiarulli/nvcode-color-schemes.vim/pull/49