lol are you sure you want to do that? j/k welcome to the best DE out there
Basically what you want to do is revert the packages listed here with
-Runs except for manjaro-settings-manager :
Instructs pacman to ignore file backup designations. Normally, when a file is removed from the system, the database is checked to see if the file should be renamed with a
Remove each target specified including all of their dependencies, provided that (A) they are not required by other packages; and (B) they were not explicitly installed by
the user. This operation is recursive and analogous to a backwards --sync operation, and it helps keep a clean system without orphans. If you want to omit condition (B),
pass this option twice.
Removes targets that are not required by any other packages. This is mostly useful when removing a group without using the -c option, to avoid breaking any dependencies.