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/themed/ghostty.conf.tpl

@@ -0,0 +1,22 @@
+background = {{ background }}
+foreground = {{ foreground }}
+cursor-color = {{ cursor }}
+selection-background = {{ selection_background }}
+selection-foreground = {{ selection_foreground }}
+
+palette = 0={{ color0 }}
+palette = 1={{ color1 }}
+palette = 2={{ color2 }}
+palette = 3={{ color3 }}
+palette = 4={{ color4 }}
+palette = 5={{ color5 }}
+palette = 6={{ color6 }}
+palette = 7={{ color7 }}
+palette = 8={{ color8 }}
+palette = 9={{ color9 }}
+palette = 10={{ color10 }}
+palette = 11={{ color11 }}
+palette = 12={{ color12 }}
+palette = 13={{ color13 }}
+palette = 14={{ color14 }}
+palette = 15={{ color15 }}