script: fix 'apply-color's

fastfetch/apply-color

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+path=$(dirname "$(readlink -f "$0")")
+. "$path"/../.utils/apply-color-parse-arg
+
+file="$path"/../fish/post.d/fetch.fish
+
+sed -i -E "s/(set -g fetch_color\s+\"#)([0-9a-fA-F]{6})(\")/\1${colorHex}\3/" "$file" || {
+    log_error "Failed to edit ${file}"
+    exit 1
+}
+
+log_success "fastfetch"