feat(system): comprehensive branding, styling, and system feature update

- Relocate themes to assets/themes/ and update all references.
- Implement custom SDDM theme and Plymouth theme enhancements.
- Add themed templates for Alacritty, Hyprland, Waybar, and other apps.
- Introduce Makima key remapper module and configuration.
- Add Voxtype and Walker configurations.
- Implement systemd power management and timeout optimizations.
- Add Nautilus-python extensions for LocalSend.
- Update branding assets and ASCII art integration.

assets/themes/ristretto/colors.toml

@@ -0,0 +1,23 @@
+accent = "#f38d70"
+cursor = "#c3b7b8"
+foreground = "#e6d9db"
+background = "#2c2525"
+selection_foreground = "#e6d9db"
+selection_background = "#403e41"
+
+color0 = "#72696a"
+color1 = "#fd6883"
+color2 = "#adda78"
+color3 = "#f9cc6c"
+color4 = "#f38d70"
+color5 = "#a8a9eb"
+color6 = "#85dacc"
+color7 = "#e6d9db"
+color8 = "#948a8b"
+color9 = "#ff8297"
+color10 = "#c8e292"
+color11 = "#fcd675"
+color12 = "#f8a788"
+color13 = "#bebffd"
+color14 = "#9bf1e1"
+color15 = "#f1e5e7"