feat(distro): rename ISO targets and fix UEFI boot in live test script

- Rename installerIso and installerIsoGraphical to nomarchy-installer and nomarchy-live.
- Update host configurations with proper Nomarchy branding and volume IDs.
- Fix nomarchy-test-live-iso QEMU launch by using -drive if=pflash for UEFI firmware.
- Add nomarchy-build-live-iso utility script.
- Scrub remaining Omarchy references in Plymouth, installer messages, and docs.
- Regenerate docs/SCRIPTS.md to reflect new and renamed utilities.

flake.nix

@@ -104,7 +104,7 @@
 
     nixosConfigurations = {
       # Minimal TTY installer ISO (new golden path)
-      installerIso = nixpkgs.lib.nixosSystem {
+      nomarchy-installer = nixpkgs.lib.nixosSystem {
         specialArgs = { inherit inputs; };
         modules = [
           { 
@@ -112,7 +112,7 @@
             nixpkgs.overlays = overlays;
           }
           "${nixpkgs}/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix"
-          ./hosts/installer-iso.nix
+          ./hosts/nomarchy-installer.nix
           {
             system.stateVersion = "25.11";
             networking.hostName = "nomarchy-installer";
@@ -129,7 +129,7 @@
             nixpkgs.overlays = overlays;
           }
           "${nixpkgs}/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix"
-          ./hosts/installer-iso.nix
+          ./hosts/nomarchy-installer.nix
           {
             system.stateVersion = "25.11";
             networking.hostName = "nomarchy-installer-vm";
@@ -140,7 +140,7 @@
       };
 
       # Graphical installer ISO (legacy, for users who prefer GUI)
-      installerIsoGraphical = nixpkgs.lib.nixosSystem {
+      nomarchy-live = nixpkgs.lib.nixosSystem {
         specialArgs = { inherit inputs; };
         modules = [
           {
@@ -149,10 +149,11 @@
           }
           "${nixpkgs}/nixos/modules/installer/cd-dvd/installation-cd-graphical-base.nix"
           home-manager.nixosModules.home-manager
-          ./hosts/live-iso.nix
+          ./hosts/nomarchy-live.nix
           ./core
           {
             system.stateVersion = "25.11";
+            networking.hostName = "nomarchy-live";
             services.displayManager.autoLogin.enable = true;
             services.displayManager.autoLogin.user = "nixos";