High-contrast themes and low-contrast themes for Gtk/KDE/et al

Might be good to include both high contrast and low contrast themes in BrightOS in some way. I think the ways high contrast themes help people with certain vision problems are well known (and actually may already be included with the default GNOME installation on Ubuntu and AlmaLinux?), but low contrast can also be very helpful and the way in which they can be helpful seems a tad lesser known. Myself I have issues using themes with black text on white backgrounds because of my sensory processing issues — they can tend to feel really harsh to look at and sometimes give me bad headaches — but I also have astigmatism that sometimes makes higher contrast dark themes difficult to read because the text looks shmeary/blurry, which is mitigated by using low contrast dark themes.

Start by reviewing the BrightOS Ansible playbook and how it could configure themes for Gtk, KDE, and other desktop environments. Before implementation, define how both high-contrast and low-contrast themes should be selected and what environments are in scope; done should provide usable support for both options.