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.

bin/apps/nomarchy-webapp-handler-hey

@@ -0,0 +1,11 @@
+#!/bin/bash
+url="$1"
+web_url="https://app.hey.com"
+
+# Handle mailto: URLs
+if [[ $url =~ ^mailto: ]]; then
+  email=$(echo "$url" | sed 's/mailto://')
+  web_url="https://app.hey.com/messages/new?to=$email"
+fi
+
+exec nnomarchy-launch-webapp "$web_url"