align everforest colors with other themes and shells

[sergiorussia]

hi.

current Everforest colors assignment differs a lot from both Everforest palette's intentions https://github.com/sainnhe/everforest/blob/master/palette.md and screenshots https://github.com/sainnhe/everforest/blob/master/README.md

this leads eg to partially unusable theme in tinted-shell https://github.com/tinted-theming/tinted-shell/blob/0c0cc5b7d262136a8598384d00f882b49464eb07/scripts/base16-everforest.sh#L8 - color00 is the same as color_background, causing inline shell comments to be invisible (try typing eg % true # this is comment - you'll see only cmd)

in this pr i align color assingments with other themes in which green is green etc. for instance i've fixed (git) diff adds/removals to be red/green instead of blue/aqua (as they should be according to both tinted-theming & Everforest guidelines).

proper shell coloring is present eg in Gogh here (at least COLOR_02..COLOR_07) and looks as expected - so i took those into account too (there's ongoing work to rebase Gogh onto tinted-theming schemes)

[sergiorussia]

current tinted-shell based with selected everforest theme

• invisible comment (color 0 = background)
• swapped colors (blue instead of red, aqua instead of green)

fixed colors (Gogh's theme rebased on tinted theme with the fix)

if we magnify a bit screenshot from Everforest's author @sainnhe reference image

it's clear to me that the fixed version looks as intented (and consistent with many other themes)

[JamyGolden]

This is a great fix, thanks @sergiorussia!