fix: resolve VM startup failures, broken Hyprland functionality, and theme integration

- Fix QEMU syntax and root filesystem conflicts in vm-guest.nix.
- Repair numerous broken relative paths and imports across the codebase.
- Set 'summer-night' as the default distro theme with full branding integration.
- Implement declarative system-wide font installation including the 'nomarchy' font.
- Fix Waybar startup by dynamically generating theme-aware CSS.
- Restore Hyprland keybindings (Super+Return, Super+Space) and wallpaper loading.
- Add missing scripts: nomarchy-launch-walker, nomarchy-toggle-waybar, nomarchy-refresh-config.
- Enable UWSM and correctly disable conflicting Hyprland systemd services.

features/scripts/utils/nomarchy-toggle-waybar

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# nomarchy-toggle-waybar: Toggle the Waybar status bar on and off.
+
+if pgrep -x waybar > /dev/null; then
+    pkill waybar
+else
+    # Start waybar in the background using uwsm
+    uwsm-app -- waybar &
+fi