add the redshift gtk color temp switcher to i3bar

**Is your feature request related to a problem? Please describe.**
to quickly adjust the color temp from i3bar, independent of the geo daemon

**Describe the solution you'd like**
as in Gnome's night light gui

**Describe alternatives you've considered**
keybindings modifiers to in/decrease within n gamma range

**Additional context**
I can see the light

The issue does not name any files, tests, or entry points in the dotfiles repository. Start by locating the i3bar configuration and any existing redshift or GTK-related setup, then determine the intended interface and confirm that color temperature can be adjusted independently of the geo daemon.

Written by the indexing model from the issue text.