Modify `g:terminal_ansi_colors`

[BrayanCaro]

Modify the list g:terminal_ansi_color to have a seamless experience with the color scheme and the theme applied

This would change the current ANSI colors used by default in the new (built-in terminal window generated by :term), as mentioned here with another theme.

Of course, I wonder if it can be setted automatically? :thinking:

Example :white_flower:

Without change g:terminal_ansi_colors:

After change g:terminal_ansi_colors (in my .vimrc) with:

 let g:terminal_ansi_colors = [
        \ '#4e4e4e', '#d68787', '#5f865f', '#d8af5f',
        \ '#85add4', '#d7afaf', '#87afaf', '#d0d0d0',
        \ '#626262', '#d75f87', '#87af87', '#ffd787',
        \ '#add4fb', '#ffafaf', '#87d7d7', '#e4e4e4'
      \ ]

By the way: this repo is excellent :heart: