script: refactor change-colortheme

fish/apply-color

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+path=$(dirname "$(readlink -f "$0")")
+. "$path"/../.utils/apply-color-parse-arg
+
+file="$path"/post.d/fetch.fish
+
+sed -i 's/^\(    set -g fetch_color "\)#\([0-9a-fA-F]\{6\}\)"/\1#'"${colorHex}"'"/' "$file" || {
+    log_error "Failed to edit ${file}"
+    exit 1
+}
+
+log_success "fastfetch"
+
+# Also apply to omp in here
+
+file="$path"/../posh_theme.omp.json
+
+sed -i 's/\("foreground":[[:space:]]*"\)#\([0-9a-fA-F]\{6\}\)"/\1#'"${colorHex}"'"/g' "$file" || {
+    log_error "Failed to edit ${file}"
+    exit 1
+}
+
+log_success "oh-my-posh"