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.

features/scripts/utils/nomarchy-build-iso

@@ -5,7 +5,7 @@
 echo "Building Nomarchy Installer ISO..."
 
 # The output will be a symlink named 'result' in the current directory
-nix build .#nixosConfigurations.installerIso.config.system.build.isoImage
+nix build .#nixosConfigurations.nomarchy-installer.config.system.build.isoImage
 
 if [ $? -eq 0 ]; then
     ISO_PATH=$(readlink -f result/iso/*.iso)