feat(theme): add arctic-fox config (#1539)

themes.gitconfig

@@ -473,3 +473,39 @@
     merge-conflict-ours-diff-header-decoration-style = "#3e3e43" box
     merge-conflict-theirs-diff-header-style = yellow bold
     merge-conflict-theirs-diff-header-decoration-style = "#3e3e43" box
+
+[delta "arctic-fox"]
+    # author: https://github.com/anthony-halim
+    dark = true
+    syntax-theme = Nord
+    file-added-label = [+]
+    file-copied-label = [==]
+    file-modified-label = [*]
+    file-removed-label = [-]
+    file-renamed-label = [->]
+    file-style = omit
+    hunk-header-decoration-style = "#5E81AC" ul
+    hunk-header-file-style = blue ul bold
+    hunk-header-line-number-style = yellow box bold
+    hunk-header-style = file line-number syntax bold italic
+    plus-style = brightgreen
+    plus-emph-style = black green
+    minus-style = brightred
+    minus-emph-style = black red
+    line-numbers = true
+    line-numbers-minus-style = brightred
+    line-numbers-plus-style = brightgreen
+    line-numbers-left-style = "#5E81AC"
+    line-numbers-right-style = "#5E81AC"
+    line-numbers-zero-style = "#4C566A"
+    zero-style = syntax
+    whitespace-error-style = black bold
+    blame-code-style = syntax
+    blame-format = "{author:<18} {commit:<6} {timestamp:<15}"
+    blame-palette = "#2E3440" "#3B4252" "#434C5E"
+    merge-conflict-begin-symbol = ~
+    merge-conflict-end-symbol = ~
+    merge-conflict-ours-diff-header-style = yellow bold
+    merge-conflict-ours-diff-header-decoration-style = "#5E81AC" box
+    merge-conflict-theirs-diff-header-style = yellow bold
+    merge-conflict-theirs-diff-header-decoration-style = "#5E81AC" box