Update to chameleon theme

[AirOnSkin]

Hey @dandavison, here's an update for the chameleon theme after some time working with it. I've also added some merge conflict config.

This is how a normal diff looks:

This is how the merge conflict looks:

[AirOnSkin]

I've removed all comments that are part of my config because other themes don't have them either, but as a reference I'll add them here:

[delta "chameleon"]
    # features
    dark = true
    line-numbers = true
    side-by-side = true
    keep-plus-minus-markers = false
    syntax-theme = Nord

    # file style
    file-style = "#434C5E" bold
    file-decoration-style = "#434C5E" ul
    file-added-label = [+]
    file-copied-label = [==]
    file-modified-label = [*]
    file-removed-label = [-]
    file-renamed-label = [->]

    # hunk header style
    hunk-header-style = omit

    # line numbers style
    line-numbers-left-format = " {nm:>3} │"
    line-numbers-left-style = red
    line-numbers-right-format = " {np:>3} │"
    line-numbers-right-style = green
    line-numbers-minus-style = red italic black
    line-numbers-plus-style = green italic black
    line-numbers-zero-style = "#434C5E" italic

    # diff style
    minus-style = bold red # line removed
    minus-emph-style = bold "#202020" "#FF5555" # changed part of line
    minus-non-emph-style = bold # changed line backdrop
    plus-style = bold green # line added
    plus-emph-style = bold "#202020" "#50FA7B" # changed part of line
    plus-non-emph-style = bold # changed line backdrop

    # unchanged lines style
    zero-style = syntax

    # style for git blame (Nord theme colors)
    blame-code-style = syntax
    blame-format = "{author:<18} ({commit:>9}) {timestamp:^16}"
    blame-palette = "#2E3440" "#3B4252" "#434C5E" "#4C566A"

    # merge conflict style (Nord theme colors)
    merge-conflict-begin-symbol = ~
    merge-conflict-end-symbol = ~
    merge-conflict-ours-diff-header-style = "#F1FA8C" bold
    merge-conflict-ours-diff-header-decoration-style = "#434C5E" box
    merge-conflict-theirs-diff-header-style = "#F1FA8C" bold
    merge-conflict-theirs-diff-header-decoration-style = "#434C5E" box

[dandavison]

Very nice, thanks @AirOnSkin!