Add missing wifi firmware checks

Some wifi-firmwares will be split into sub-packages in fedora 40
We will keep them in until fedora 41, but display a warning message
in the console if NetworkManager-wifi is layered without the most
popular the wifi firmwares.

See coreos/fedora-coreos-tracker#1575

overlay.d/15fcos/usr/lib/systemd/system-preset/45-fcos.preset

@@ -3,3 +3,6 @@ enable coreos-check-ssh-keys.service
 enable coreos-check-cgroups-version.service
 # https://fedoraproject.org/wiki/Changes/EnableFwupdRefreshByDefault
 enable fwupd-refresh.timer
+# Check if wifi firmwares are missing when NetworkManager-wifi is installed
+# https://github.com/coreos/fedora-coreos-tracker/issues/1575
+enable coreos-check-wireless-firmwares.service

overlay.d/15fcos/usr/lib/systemd/system/coreos-check-wireless-firmwares.service

@@ -0,0 +1,10 @@
+# This service is used for printing a message if
+# some wireless firmwares are missing
+[Unit]
+Description=Check if all the wireless firmwares are installed
+[Service]
+Type=oneshot
+ExecStart=/usr/libexec/coreos-check-wireless-firmwares
+RemainAfterExit=yes
+[Install]
+WantedBy=multi-user.target

overlay.d/15fcos/usr/libexec/coreos-check-wireless-firmwares

@@ -0,0 +1,45 @@
+#!/usr/bin/bash
+# This script checks if
+# and will prints a message to the serial console
+# to warn the user about missing wifi firmware messages
+# and provide remediation steps
+# See https://github.com/coreos/fedora-coreos-tracker/issues/1575
+
+layered_packages="$(rpm-ostree status --json -b | jq -r '.deployments[0].packages[]')"
+
+if echo "$layered_packages" | grep -q "NetworkManager-wifi"; then
+  if echo "$layered_packages" | grep -q "atheros-firmware"  && \
+     echo "$layered_packages" | grep -q "brcmfmac-firmware" && \
+     echo "$layered_packages" | grep -q "mt7xxx-firmware"   && \
+     echo "$layered_packages" | grep -q "realtek-firmware"
+  then
+    return 0
+  fi
+else
+  return 0
+fi
+
+# Change the output color to yellow
+warn=$(echo -e '\033[0;33m')
+# No color
+nc=$(echo -e '\033[0m')
+
+motd_path=/run/motd.d/30_wireless_firmwares_warning.motd
+
+cat << EOF > "${motd_path}"
+${warn}
+##########################################################################
+WARNING: The NetworkManager-wifi is installed on this system.
+However, some wifi-firmwares are not installed.
+
+To layer the missing firmwares use the following :
+sudo rpm-ostree install atheros-firmware brcmfmac-firmware \
+mt7xxx-firmware realtek-firmware
+
+Then reboot the system.
+
+To disable this warning, use:
+sudo systemctl disable coreos-check-wireless-firmwares.service
+##########################################################################
+${nc}
+EOF