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/kanagawa/colors.toml

@@ -0,0 +1,23 @@
+accent = "#7e9cd8"
+cursor = "#c8c093"
+foreground = "#dcd7ba"
+background = "#1f1f28"
+selection_foreground = "#c8c093"
+selection_background = "#2d4f67"
+
+color0 = "#090618"
+color1 = "#c34043"
+color2 = "#76946a"
+color3 = "#c0a36e"
+color4 = "#7e9cd8"
+color5 = "#957fb8"
+color6 = "#6a9589"
+color7 = "#c8c093"
+color8 = "#727169"
+color9 = "#e82424"
+color10 = "#98bb6c"
+color11 = "#e6c384"
+color12 = "#7fb4ca"
+color13 = "#938aa9"
+color14 = "#7aa89f"
+color15 = "#dcd7ba"