feat: Add a helpful message to bash for common secure boot & Nvidia u…

…ser issues.

system_files/desktop/shared/usr/etc/profile.d/bazzite-warnings.sh

@@ -0,0 +1,12 @@
+IMAGE_INFO="/usr/share/ublue-os/image-info.json"
+IMAGE_FLAVOR=$(jq -r '."image-flavor"' < $IMAGE_INFO)
+
+if [[ $IMAGE_FLAVOR = "nvidia"  ]]; then
+	if ! grep -q "nvidia" <<< $(lsmod) || grep -q "nouveau" <<< $(lsmod); then
+		echo -e 'You are using a Nvidia image, but the Nvidia driver is not loaded:\n - If you are using secure boot, run "just enroll-secure-boot-key", then reboot and enter the password "ublue-os" when prompted.\n - If you are not using secure boot or have already enrolled the above key, ensure you have the needed kargs by running "just nvidia-set-kargs" and then rebooting.\n - This message will not appear if the issue is resolved.\n'
+	fi
+else
+	if ! grep -q "xone" <<< $(lsmod); then
+		echo -e 'Requires drivers could not be loaded:\n - If you are using secure boot, run "just enroll-secure-boot-key", then reboot and enter the password "ublue-os" when prompted.\n - This message will not appear if the issue is resolved.\n'
+	fi
+fi