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/apple/fix-spi-keyboard.sh

@@ -0,0 +1,15 @@
+# Detect MacBook models that need SPI keyboard modules
+product_name="$(cat /sys/class/dmi/id/product_name 2>/dev/null)"
+if [[ $product_name =~ MacBook[89],1|MacBook1[02],1|MacBookPro13,[123]|MacBookPro14,[123] ]]; then
+  echo "Detected MacBook with SPI keyboard"
+
+  omarchy-pkg-add macbook12-spi-driver-dkms
+  sudo mkdir -p /etc/mkinitcpio.conf.d
+  if [[ $product_name == "MacBook8,1" ]]; then
+    echo "MODULES=(applespi spi_pxa2xx_platform spi_pxa2xx_pci)" | \
+      sudo tee /etc/mkinitcpio.conf.d/macbook_spi_modules.conf >/dev/null
+  else
+    echo "MODULES=(applespi intel_lpss_pci spi_pxa2xx_platform)" | \
+      sudo tee /etc/mkinitcpio.conf.d/macbook_spi_modules.conf >/dev/null
+  fi
+fi