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.

core/system/vm-guest.nix

@@ -4,12 +4,12 @@
   # Shared VM configuration
   virtualisation.vmVariant = {
     virtualisation.graphics = true;
-    virtualisation.qemu.options = [ "-device virtio-vga" ];
+    virtualisation.qemu.options = [ "-device" "virtio-vga" ];
   };
 
   # Dummy hardware config for VM
-  fileSystems."/" = { device = "/dev/disk/by-label/nixos"; };
-  boot.loader.grub.device = "/dev/vda";
+  fileSystems."/" = lib.mkDefault { device = "/dev/disk/by-label/nixos"; };
+  boot.loader.grub.device = lib.mkDefault "/dev/vda";
   boot.initrd.availableKernelModules = [ "virtio_pci" "virtio_blk" "virtio_gpu" "virtio_net" "virtio_mmio" ];
   
   # Force early KMS for Plymouth