feat: add dosfstools for /boot recovery (#5448)

Adds dosfstools to default installs and migrates existing systems so fsck.fat and mkfs.fat are available for Omarchy’s FAT32 /boot partition. This also helps with recovery from dirty or corrupt FAT filesystems after unclean shutdowns or power loss.

install/omarchy-base.packages

@@ -24,6 +24,7 @@ cups-pdf
 docker
 docker-buildx
 docker-compose
+dosfstools
 dotnet-runtime-9.0
 dust
 evince