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/framework/qmk-hid.sh

@@ -0,0 +1,8 @@
+# Allow unprivileged access to the Framework 16 keyboard for RGB control via qmk_hid.
+
+if omarchy-hw-framework16; then
+  sudo mkdir -p /etc/udev/rules.d
+  if [[ ! -f /etc/udev/rules.d/50-framework16-qmk-hid.rules ]]; then
+    sudo cp -f "$OMARCHY_PATH/default/udev/framework16-qmk-hid.rules" /etc/udev/rules.d/50-framework16-qmk-hid.rules
+  fi
+fi