Make setup ISO-only

Remove legacy online installer entrypoints, collapse migrations for 4.0, and move setup responsibilities into target-side system, hardware, and user commands.

install/hardware/nvidia.sh

@@ -0,0 +1,33 @@
+if lspci | grep -qi 'nvidia'; then
+  # Check which kernel is installed and set appropriate headers package
+  KERNEL_PACKAGE=$(pacman -Qqs '^linux(-zen|-lts|-hardened|-t2|-ptl)?$' | head -1 || true)
+  [[ -n $KERNEL_PACKAGE ]] && omarchy-pkg-add "$KERNEL_PACKAGE-headers"
+
+  if omarchy-hw-nvidia-gsp; then
+    PACKAGES=(nvidia-open-dkms nvidia-utils lib32-nvidia-utils libva-nvidia-driver)
+  elif omarchy-hw-nvidia-without-gsp; then
+    PACKAGES=(nvidia-580xx-dkms nvidia-580xx-utils lib32-nvidia-580xx-utils)
+  fi
+
+  # Bail if no supported GPU
+  if [[ -z ${PACKAGES+x} ]]; then
+    echo "No compatible driver for your NVIDIA GPU. See: https://wiki.archlinux.org/title/NVIDIA"
+    exit 0
+  fi
+
+  omarchy-pkg-add "${PACKAGES[@]}"
+
+  # Per-session Hyprland NVIDIA env vars are handled by default/hypr/nvidia.lua.
+
+  # Configure modprobe for early KMS
+  mkdir -p /etc/modprobe.d
+  cat > /etc/modprobe.d/nvidia.conf <<'EOF'
+options nvidia_drm modeset=1
+EOF
+
+  # Configure mkinitcpio for early loading
+  mkdir -p /etc/mkinitcpio.conf.d
+  cat > /etc/mkinitcpio.conf.d/nvidia.conf <<'EOF'
+MODULES+=(nvidia nvidia_modeset nvidia_uvm nvidia_drm)
+EOF
+fi